System.TypeLoadException and Lua

I finally got vc.net to compile my landscape engine that up until now I've been developing in Linux. But when I try to run the program I get an error that says "Unhandled Exception: System.TypeLoadException: Could not load type lua_State from assembly light, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null." The error is occuring at this line:

p.state = lua_open();

where p.state is a lua_State. What does this mean? Is there something wrong with the Lua library I've compiled?