w2003 / IIS6 / ASP stops after some hours

I am using asp pages on a w2003/iis6 server. Everything worked fine in win2000/IIS5, but in our new server, the asp pages become unavailable after some hours.
HTML pages work fine.

After restart server, everything works ok again, for some hours more....

Thanks in advance for your help,
Kimi

Is there anything that will give you a clue in the server event logs?

Some kind of coding problem in your pages may be causing resource leaks or something. Perhaps you can find something out with performance monitor.

The only erros i get on Event Viewer is one related to memory on logon, and another related to PDF Drivers ?!


FIRST ONE - SHOWS ONLY ON REEBOT MACHINE
AMLI: ACPI BIOS is attempting to read from an illegal IO port address (0xcfc), which lies in the 0xcf8 - 0xcff protected address range. This could lead to system instability. Please contact your system vendor for technical assistance.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

SECOND ERROR
Driver Acrobat PDFWriter required for printer Acrobat PDFWriter is unknown. Contact the administrator to install the driver before you log in again.

For more information, see Help and Support Center at URL.

I have the same problem. no logging message for IIS log.
what is performance monitor? how can I use it?

read more messages from Doug, is my host antivirus soft block the iis? maybe or not?
but I need the antivirus soft, how can I do?

but in 2000/iis5.0, also has antivirus soft, it ran well.!

None of these sound like IIS related messages. I don't know, if you have more than one website try running them one at a time & see if you can isolate which site is causing the problem.

I have exactly the same problem since month. the only thing which helped was recovering the application pool every minutes. however the session-variables are lost with it and so this method is not useable.
There are no hints in the iis-logs, httperr logs and other eventlogs.