Have four asp pages which query an access db to authenticate the user, provide their schedule and appointment sheet. They have worked fine for over a year. Now the ISP is saying the asp code is causing an internal server error 500. Nothing unique about the code. Uses one session variable that isn't an object. The only questionable factor is that the database does have some null values in the data being queried. Any ideas on what could cause it to hang or is the ISP just blaming the programmer? They aren't a very large ISP, so it may also be that they have too many web sites on one box. Any suggestions?