500 error

I have upgraded my hosting and upgraded the asp to 4.0, after the hosting upgrade my site worked finr, but after the asp upgrade I get a 500 error.

I know very little about script changes, I can make them and have managed to customize my template for my store,  I need lots of info on location of changes to be made and so on.
Thanks
Keith

If you are using internet explorer

go tools>options and disable SHOW FRIENDLY HTTP MESSAGES

find the error and paste the error here.

or u can find the error in firefox or opera.

It still shows same information a 500 (Internal Server) Error

Ok, figured out how to get the error detailed. It says I havent uploaded any files, yet all of my files are still in the same place they were before. I have no messed with them. All I did was update the hosting and asp. So now what?