MTA:Race server on linux

[Lance2007]

Hi. I am install UBUNTU 9.01 on my server.

Now if i run server, he show me this message:

MTA:BLUE Server for MTA:SA

./net.so: cannot open shared object file: No such file or directory

ERROR: Loading network library (./net.so) failed!

Press Q to shut down the server!

All answer on this forum don't help me.

Sorry for my bad English