WSDL file, what am I doing wrong?

Question

PHP

Hello. Please help with a web service
. I'm trying to write my own web service.
WSDL file is like this

<?xml version="1.0" encoding="utf-8"?>
<!--Created with Liquid XML Studio Developer Edition 9.0.11.3078 (http://www.liquid-technologies.com)-->
<definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://example.com/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" name="opt.inmark" targetNamespace="http://opt.inmark.biz" xmlns="http://schemas.xmlsoap.org/wsdl/">
    <types>
        <xs:schema xmlns:tns="http://schemas.xmlsoap.org/wsdl/" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://example.com/">
            <element name="InputType">
                <complexType>
                    <sequence>
                        <element name="input" type="string" />
                    </sequence>
                </complexType>
            </element>
            <element name="OutputType">
                <complexType>
                    <sequence>
                        <element name="output" type="string" />
                    </sequence>
                </complexType>
            </element>
        </xs:schema>
    </types>
    <message name="findingPartNumber">
        <part name="InputMessagePart" type="xs:string" />
    </message>
    <message name="resultFindPart">
        <part name="OutputMessagePart" type="xs:string" />
    </message>
    <message name="findingPartStep1">
        <part name="InputMessagePart" type="xs:string" />
    </message>
    <message name="resultFindPartStep1">
        <part name="OutputMessagePart" type="xs:string" />
    </message>
    <message name="findingPartStep2">
        <part name="InputMessagePart" type="xs:string" />
    </message>
    <message name="resultFindPartStep2">
        <part name="OutputMessagePart" type="xs:string" />
    </message>
    <message name="requestAddBacket">
        <part name="InputAddBacket" type="xs:string" />
    </message>
    <message name="responseAddBacket">
        <part name="OutputAddBacket" type="xs:string" />
    </message>
    <message name="requestEditBacket">
        <part name="InputEditBacket" type="xs:string" />
    </message>
    <message name="responseEditBacket">
        <part name="OutputEditBacket" type="xs:string" />
    </message>
    <message name="requestDeleteBacket">
        <part name="InputDeleteBacket" type="xs:string" />
    </message>
    <message name="responseDeleteBacket">
        <part name="OutputDeleteBacket" type="xs:string" />
    </message>
  <message name="requestMakeOrder">
        <part name="InputMakeOrder" type="xs:string" />
    </message>
    <message name="responseMakeOrder">
        <part name="OutputMakeOrder" type="xs:string" />
    </message>
    <portType name="partsPort">
        <operation name="SearchOffer">
            <input  xmlns:q1="http://opt.inmark.biz"  message="q1:findingPartNumber" />
            <output  xmlns:q2="http://opt.inmark.biz"  message="q2:resultFindPart" />
        </operation>
        <operation name="SearchOfferStep1">
            <input message="tns:findingPartStep1" />
            <output message="tns:resultFindPartStep1" />
        </operation>
        <operation name="SearchOfferStep2">
           <input message="tns:findingPartStep2" />
            <output message="tns:resultFindPartStep2" />
        </operation>
        <operation name="AddBacket">
            <input message="tns:requestAddBacket" />
            <output message="tns:responseAddBacket" />
        </operation>
        <operation name="EditBacket">
            <input message="tns:requestEditBacket" />
            <output message="tns:responseEditBacket" />
        </operation>
        <operation name="DeleteBacket">
            <input message="tns:requestDeleteBacket" />
            <output message="tns:responseDeleteBacket" />
        </operation>
        <operation name="MakeOrder">
            <output message="tns:responseMakeOrder" />
        </operation>
    </portType>
    <binding xmlns:q3="http://opt.inmark.biz" name="partsBinding" type="q3:partsPort">
        <soap:binding transport="http://schemas.xmlsoap.org/soap/http" />
         <operation name="SearchOffer">
            <soap:operation soapAction="" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
        <operation name="SearchOfferStep1">
            <soap:operation soapAction="" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
        <operation name="SearchOfferStep2">
            <soap:operation soapAction="" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
        <operation name="AddBacket">
            <soap:operation soapAction="" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
        <operation name="EditBacket">
            <soap:operation soapAction="" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
        <operation name="DeleteBacket">
            <soap:operation soapAction="" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
        <operation name="MakeOrder">
            <soap:operation soapAction="" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
    </binding>
    <service name="getAllSupliers">
        <port xmlns:q4="http://opt.inmark.biz" name="getParts" binding="q4:partsBinding">
            <soap:address location="http://opt.inmark.biz/webservice" />
        </port>
    </service>
</definitions>

PHP SOAP client works fine. But when you try to pull the web service with something else, for example, the Firefox extension "SOA client", the error Procedure 'SearchOffer' not present pops up.
What's wrong with my WSDL?