If you are having problems, it should not be due the technology deployed on the server side.

LWP is a set of Web client libraries that make requests using HTTP and other protocols. ASP is a server-side technology that is used to send responses to HTTP requests. So, as long as LWP and ASP deal with HTTP well (which in my experience they do - I dislike ASP, but there are other reasons for that), the specific languages and technologies deployed should not cause a problem.