On a client site, which was using some ASP.NET code to gain access to our Web Service, they can no longer execute properly the method accesses to the Web Service. On the server side, I have recompile the Web Service in .NET 2.0. Does this mean the client site has to install the .NET Framework 2.0 to be able to continue to run ok?

Because, from all my tests, all the other services are continuing to work ok with that Web Service. But, they are all being executed on platform having the .NET Framework 2.0.