Using luasocket from lua script undefined symbol

[Juan Segarra Montesinos]

Hi all. I'm trying to use luasocket library from a lua script in mysql proxy to communicate with a server. I get the following error:

error loading module 'socket.core' from file '/usr/local/lib/lua/5.1/socket/core.so':
/usr/local/lib/lua/5.1/socket/core.so: undefined symbol: lua_insert

I can use luasocket from lua binary without problems.

Any ideas?

Thanks in advance :)