EventType clr20r3 system.io.filenotfoundexception

[Raja B]

I start getting this exception when I moved my windows service to a
Windows 2003 (32 bit running on AMD Opteron processors) server with
..NET framework 2.0 .

The EventLog says

Event Type: Error
Event Source: .NET Runtime 2.0 Error Reporting
Event Category: None
Event ID: 5000
Date: 2/22/2006
Time: 5:23:58 PM
User: N/A
Computer: UATDATASVCS01
Description:
EventType clr20r3, P1 bo_winservicehost.exe, P2 1.0.0.0, P3 43fcd0f2,
P4 mscorlib, P5 2.0.0.0, P6 4333ab80, P7 122f, P8 14, P9
system.io.filenotfoundexception, P10 NIL.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.

The application seems to be running OK on 64 bit machines and also on
Win 2000 environments. Seems like a CLR issue. So I used filemon to
identify which files were missing. Its not able to find mscorlib.pdb ,
enterprisesec.config.cch.5184.319919125 and
security.config.cch.5184.319919125

The following is the result from filemon.

5:56:31
PM BO_WinServiceHo:5184 READ
C:\WINDOWS\assembly\GAC_32\mscorlib\2.0.0.0__b77a5 c561934e089\mscorlib.dll
SUCCESS Offset:
3935792 Length: 512
5:56:31
PM BO_WinServiceHo:5184 OPEN
C:\WINDOWS\assembly\GAC_32\mscorlib\2.0.0.0__b77a5 c561934e089\mscorlib.pdb
NOT
FOUND Options: Open Access: All
5:56:31
PM BO_WinServiceHo:5184 OPEN
C:\WINDOWS\symbols\dll\mscorlib.pdb NOT
FOUND Options: Open Access: All
5:56:31 PM BO_WinServiceHo:5184 OPEN
C:\WINDOWS\dll\mscorlib.pdb PATH
NOT FOUND Options: Open Access: All
5:56:31 PM BO_WinServiceHo:5184 OPEN C:\WINDOWS\mscorlib.pdb
NOT
FOUND Options: Open Access: All
5:56:31
PM BO_WinServiceHo:5184 CLOSE
C:\WINDOWS\assembly\GAC_32\mscorlib\2.0.0.0__b77a5 c561934e089\mscorlib.dll
SUCCESS
5:56:31
PM BO_WinServiceHo:5184 OPEN
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\conf ig\security.config.cch.5184.319919125
NOT
FOUND Options: Open Access: All
5:56:31
PM BO_WinServiceHo:5184 OPEN
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\conf ig\enterprisesec.config.cch.5184.319919125
NOT
FOUND Options: Open Access: All
Any pointers / ideas to resolve this issue is highly appreciated.

Thanks
Raja B