ASP Error 0x80004005 Unspecified Error

Hi,

i've got the following problem.
I'm hosting about 200 Webs on a Windows 2003 SP1 Box. Occasionally (i
couldn't reproduce the error - it occurs every 1-3 days) the following error
message appears on ASP-Pages which connect to Access-Databases:

0x80004005 Unspecified Error

At the same time also ASP.NET Applications stop working and respond with the
following error code:

OleDbException (0x80004005): Unspecified error]
System.Data.OleDb.OleDbConnection.ProcessResults(Int32 hr) +20
System.Data.OleDb.OleDbConnection.InitializeProvider() +57
System.Data.OleDb.OleDbConnection.Open() +203
uhshp_neu.News.Page_Load(Object sender, EventArgs e)
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Control.LoadRecursive() +98
System.Web.UI.Control.LoadRecursive() +98
System.Web.UI.Control.LoadRecursive() +98
System.Web.UI.Page.ProcessRequestMain() +750

When i restart the IIS Services (IIS Admin, WWW Publishing, FTP Service)
anything works fine.

I already found some Tips to resolve the problem but no one worked in my case.
- NTFS rights on Data + Temp directories (MDB Homepath, System - Temp
directory) are set to "Change" for IIS User + ASPNET User. On System Temp
directory the NTFS rights are set to "Change" for Everyone.
- I did everything described in KB251254
- I did everything mentioned at http://www.aspfaq.com/show.asp?id=2009

Additional info: the problem exists since i moved the webs from a old win2k
box to that new win2003 box. On the old box everything worked fine!

Has anyone of you another idea for me?

Thanks in advance,

Roman Jachs