c# database connection on debian server

I made a program, what connect to a database. I did it on windows with c#. I used the Mysql connector. When I tried to use the same program on my Debian server it didn't start... I searched a lot, and i couldn't find anything. Can you guys please give me some information about mysql c# and debian? I use monodevelop for programming in debian for the server and I use visual studio 2012 and unity for programming the client.

If i run my server than i get this message: Missing method .ctor in assembly...

(this program is a server-client program what is used to communicate and after i make this i want to make a game in unity, i made the "talk-part" i can send message to the server and the server sends it to the clients, but i want to make a database for accounts and log, i have a debian server with mysql server. It works great, i can connect to the mysql server via Navicat from my windows)

Thank you for the answer.