Error - can not find luanet.so

[janoskaz]

When trying to debug and use LuaInterface in Mono under Ubuntu, I get following error:

Unhandled Exception: System.DllNotFoundException: luanet.so
  at (wrapper managed-to-native) LuaInterface.LuaDLL:lua_pushstdcallcfunction     (intptr,LuaInterface.LuaCSFunction)
  at LuaInterface.ObjectTranslator.createBaseClassMetatable (IntPtr luaState) [0x00000] in <filename unknown>:0 
  at LuaInterface.ObjectTranslator..ctor (LuaInterface.Lua interpreter, IntPtr luaState) [0x00000] in <filename unknown>:0 
  at LuaInterface.Lua..ctor () [0x00000] in <filename unknown>:0 
  at TestLua.Main (System.String[] args) [0x00000] in /home/zbynek/Plocha/csharp/Game/Lua/LuaProject/Program.cs:7 
[ERROR] FATAL UNHANDLED EXCEPTION: System.DllNotFoundException: luanet.so
  at (wrapper managed-to-native) LuaInterface.LuaDLL:lua_pushstdcallcfunction (intptr,LuaInterface.LuaCSFunction)
  at LuaInterface.ObjectTranslator.createBaseClassMetatable (IntPtr luaState) [0x00000] in <filename unknown>:0 
  at LuaInterface.ObjectTranslator..ctor (LuaInterface.Lua interpreter, IntPtr luaState) [0x00000] in <filename unknown>:0 
  at LuaInterface.Lua..ctor () [0x00000] in <filename unknown>:0 
  at TestLua.Main (System.String[] args) [0x00000] in /home/zbynek/Plocha/csharp/Game/Lua/LuaProject/Program.cs:7 

My luai file points to directory, where both LuaInterface.dll and luanet.so are, but the second one does not seem to be found/seen?