A problem about portting one asp.net project to mono under

[zlprog]

there is a DLL in bin directory of asp project. this DLL was written by VC6.0. I don't have source code of this DLL. The mono report a error "can't not find meta data in the DLL", I think that this DLL is not written by C#, so mono can't load it, I want to use wine, but I don't know how to do it, can anyone help me? Thansk!