Dear Friend,
The above error is quiet misleading due to the fact that this error may be because of many reasons like:-
1) Assembly missing.
2) Re-Deployment required.
3) Project in old version and build has been made in new version.
etc...
Please first open your application in which ever version of .Net you are using and if conversion is required then do it and then rebuild your whole application again, make new build of that and lastly republish it. I hope it will solve the problem. Pleas refer to the following link for more details on it:-
http://stackoverflow.com/questions/602117/how-to-fix-asp-net-error-the-file-nnn-aspx-has-not-been-pre-compiled-and-can[
^]
Please don't forget to mark this as your answer if it helps you out.
Thanks