IIS 6.0 + Exchange 2003 SP1 + service unavailable

With the components above i got a problem:
I had to transfer the Exchange server from an old hardware to a Dual Opteron
Machine with the way mentionned in KB822945 and nearly all was working fine.
About two weeks ago i got the information from my mobile users that can´t
access with OWA. I tried to access the server with OWA or only to access the
default website in IIS 6. Unfortunately i always get the server message
"Service unavailable".
I examined the Web apps and the website, all were running.
But httperr.log sometimes says something like 503 service unavailable
appclosed
In the eventlogs i rarely get these messages:

Source: W3SVC-WP Event-ID 2214
.... in german ...
Die Beschreibung der Ereigniskennung (2214) in (W3SVC-WP) wurde nicht
gefunden. Der lokale Computer verfügt nicht über die zum Anzeigen der
Meldungen von einem Remotecomputer erforderlichen Registrierungsinformationen
oder DLL-Meldungsdateien. Ereignisinformationen: C:\Program Files\Common
Files\Microsoft Shared\Web Server Extensions\40\bin\fpexedll.dll.
.... in german ...
and
Source: W3SVC-WP Event-ID 2268

Die Beschreibung der Ereigniskennung (2268) in (W3SVC-WP) wurde nicht
gefunden. Der lokale Computer verfügt nicht über die zum Anzeigen der
Meldungen von einem Remotecomputer erforderlichen Registrierungsinformationen
oder DLL-Meldungsdateien. Ereignisinformationen: fpexedll.dll.

Can you report the "data" mentioned in each event you gave?

The problem looks like "C:\Program Files\Common Files\Microsoft Shared\Web
Server Extensions\40\bin\fpexedll.dll" does not exist -- hence when the site
loads, it fails on startup. The "data" is going to give the reason for
failing to load, which we need to know so that we know how to correct the
issue.

-
//David
IIS
http://blogs.msdn.com/David.Wang
This posting is provided "AS IS" with no warranties, and confers no rights.
//
"FRED Z." <FRED Z..TakeThisOut@discussions.microsoft.com> wrote in message
news:7FD3A5B9-B07B-493F-8512-26EB94F81747@microsoft.com...
With the components above i got a problem:
I had to transfer the Exchange server from an old hardware to a Dual Opteron
Machine with the way mentionned in KB822945 and nearly all was working fine.
About two weeks ago i got the information from my mobile users that can´t
access with OWA. I tried to access the server with OWA or only to access the
default website in IIS 6. Unfortunately i always get the server message
"Service unavailable".
I examined the Web apps and the website, all were running.
But httperr.log sometimes says something like 503 service unavailable
appclosed
In the eventlogs i rarely get these messages:

Source: W3SVC-WP Event-ID 2214
.... in german ...
Die Beschreibung der Ereigniskennung (2214) in (W3SVC-WP) wurde nicht
gefunden. Der lokale Computer verfügt nicht über die zum Anzeigen der
Meldungen von einem Remotecomputer erforderlichen
Registrierungsinformationen
oder DLL-Meldungsdateien. Ereignisinformationen: C:\Program Files\Common
Files\Microsoft Shared\Web Server Extensions\40\bin\fpexedll.dll.
.... in german ...
and
Source: W3SVC-WP Event-ID 2268

Die Beschreibung der Ereigniskennung (2268) in (W3SVC-WP) wurde nicht
gefunden. Der lokale Computer verfügt nicht über die zum Anzeigen der
Meldungen von einem Remotecomputer erforderlichen
Registrierungsinformationen
oder DLL-Meldungsdateien. Ereignisinformationen: fpexedll.dll.