VPN Server Windows Server 2012 R2 + VPN Client DIR-100 - how to solve the problem?

Question

VPN

Good time of the day!
Help solve the problem.
There is a server with a static IP VPN Server Windows Server 2008
It has a VPN server with PPTP, L2TP, SSTP protocols, in general, a classic of the genre.
I want to put the miracle DIR-100 as a VPN client at remote offices so that users and PCs do not mess with VPN settings every time.
If users make vpn connections, everything connects clearly with correct logins and passwords. Put a miracle DIR-100 does not connect. Login/pass checked 324 times. BUT when I ticked the box on the server
https://yadi.sk/i/Wuja2kGzXByqz Allow remote clients to connect without method negotiation, everything worked. But you can't leave it like that! The enemy does not sleep!
Tell me what's wrong so that the DIR-100 connects with normal authentication by login and pass.
DIR-100
H/W B1
Firmware 2.03
Thank you!