Compatibility Problem

Question

I need to use a webservice written in c# using framework v2.0.40607, from a client written in c# using framework v1.1.4322. The problem is that wsdl.exe of vs 2003 can't generate the proxy class, because it don't understand the wsdl file generated by the webservice. For instance if I generate the class using wsdl.exe of vs 2005, when I include it in my 2003 project, there are some namespaces, that of course it don't have. advance thank's.