Problems with Windows 2003 Service Pack 1 and IsolatedStorage

[Simon Chester]

Hello! Can anyone help me with this problem?...

I have developed an ASP.NET (version 1.1) application which I have deployed
to a number of webservers.

The web application works fine on Windows 2000 Server computers. It also
works OK on Windows 2003 Server UNTIL Windows 2003 Service Pack 1 is
installed!

The error and stack trace I am given is:

[DirectoryNotFou ndException: Could not find a part of the path "*".]
System.IO.__Err or.WinIOError(I nt32 errorCode, String str) +287

System.IO.Isola tedStorage.Isol atedStorageFile .GetFileDirecto ryNames(String
path, String msg, Boolean file) +373
System.IO.Isola tedStorage.Isol atedStorageFile .GetRandomDirec tory(String
rootDir, Boolean& bMigrateNeeded, String& sOldStoreLocati on) +55

System.IO.Isola tedStorage.Isol atedStorageFile .InitGlobalsNon Roaming(Isolate dStorageScope scope) +112

System.IO.Isola tedStorage.Isol atedStorageFile .GetRootDir(Iso latedStorageSco pe
scope) +98

System.IO.Isola tedStorage.Isol atedStorageFile .GetGlobalFileI OPerm(IsolatedS torageScope scope) +208
System.IO.Isola tedStorage.Isol atedStorageFile .Init(IsolatedS torageScope
scope) +37

System.IO.Isola tedStorage.Isol atedStorageFile .GetStore(Isola tedStorageScope
scope, Type domainEvidenceT ype, Type assemblyEvidenc eType) +66
System.IO.Isola tedStorage.Isol atedStorageFile .GetUserStoreFo rDomain() +12

CMTC.Web.Config uration.WebAppC onfigurator.Web AppConfigurator .LoadAppSetting s()

CMTC.Web.Config uration.WebAppC onfigurator.Web AppConfigurator .GetValue(Strin g
key)
CMTC.Kumquat.Ku mquatConfigurat or.get_IsDataSo urceFullyConfig ured() +41
CMTC.Kumquat.Ku mquatConfigurat or.get_IsFullyC onfigured() +12
CMTC.Kumquat.Gl obal.Applicatio n_BeginRequest( Object sender, EventArgs e)
+562

System.Web.Sync EventExecutionS tep.System.Web. HttpApplication +IExecutionStep .Execute() +60
System.Web.Http Application.Exe cuteStep(IExecu tionStep step, Boolean&
completedSynchr onously) +87

As you can see, this problem is been caused by an Isolated Storage function.
I am confident that my code is correct (because it works fine on Windows 2000
and before Windows 2003 SP1 is applied). Therefore, I suspect that the
service pack changes some permissions on the computer that causes this
problem. However, I have been unable to determine exactly what permissions it
changes (machine.config and File System permissions for the Network Service
user look OK).

Has anyone else experienced anything similiar? What is it that Windows 2003
Service Pack 1 changes that interrupts the way my app uses Isolated Storage?

Any suggestions gratefully received!