Framework issue

Question

I have developed my project in the following environment (VB.NET) Microsoft development environment - 2002 Microsoft .net framework - 1.0.3705 Then i compiled the version of .net framework to 1.1.4322. Most of the codings doesn't support the new version of framework ,but it works fine with the older version ( i didn't change any of my codings ) For example Enterkey & Escape key validation failed to invoke, and my user controls doesn't respond properly. How to resolve this? Ragards, Vidya