Cut speed over VPN?

Question

VPN

Greetings. The situation is this: I have a VDS in Florida. Raised a VPN PP2P server, connected a home PC to it. The data exchange speed is very low (about 10 kb/s). Dear, what can be done?
Server and PC on Ubuntu, VDS from eomy.net
Some information about the server:

RAM: 512 MB
Connection: 1000 MBit (1 GbE)
1 IP address
Virtualization technology: OpenVZ+VSwap