ASP with SBS-2003: slower with each page-call

Hello!

My ASP-project works fine on a XP-System. Now I transfered the project to a
SBS-2003 and the access is slower and slower with each call of a page, until
a page needs up to 2 Minutes to open, when it access the mdb (Driver:
Microsoft Access Driver .mdb, ADODB.Connection). In this situation the
Servers bores itself (works with 3 percent). The problem is only when
accessing the mdb - the ASP-pages without mdb are called fast. When I
restart the IIS, all is OK - for 1 to 2 hours.

I have checked, that the mdb-object is closed on every page and set to
nothing. The Anti-Virus software can't be the problem (its the same without
AV). In the log-files I found no errors.

Summary:
ASP/IIS + XP = OK.
ASP/IIS + Server = slower and slower.

Is there any big difference between IIS on XP and IIS on SBS-2003, or any
lock-situation when I work with mdb?

Has anyone a reference, where I can search for a solution of this problem?

Many thanks
Ludwig
Austria/Europe