I had something similar when one of our customers moved from 2k to 2k3 iis6. one of my dll's was not connecting into our backend properly after the move. i added in some code in various places that connected to a logging table and added in a record when it had got so far. i was intending to use this to tell me where exactly it was going wrong, but this actually fixed the problem so i left it there! i didn't change a single lone of functional code bar adding in about six instances of

sele logtable
append blank
repl field1 with "starting"

since it fixed the problem i havn't revisited it but know that i should:)
Slán
~M

>I am having trouble with an ASP.NET application running on Win 2003 Server (SP1) with IIS6. The application runs fine with IIS5 on a W2000 Pro machine. Switching IIS6 to run in IIS5 isolation mode doesn’t help. The web app uses a dll which is built with VFP 8 to gather and store data from/to a VFP database. Each call to the dll creates an instance in VB, gets/stores data, and then closes the object. However, using IIS6, after about 25 calls to the dll on various pages, the object created doesn’t work correctly. Objects created inside the dll disappear shortly after they are created. The VFP code checks to make sure the object is there and then before it can use the object it is gone and an ‘object not found’ error occurs. I cannot find any setting for IIS that ‘fixes’ the problem or makes it worse or better in any way. Both machines are using version 1.1.4322 of the .net framework.
>Thanks for any help or suggestions.