If this helps this was the exception that was logged.
--- End of inner exception stack trace ---
</value></property><property><name>StackTrace</name></property><property><name>Source</name></property></properties></log><log LogGUID="317c5b2a-3d70-4beb-b13c-1481a1c9f5ca" LogTypeKey="GENERAL_EXCEPTION" LogUserID="-1" LogUserName="" LogPortalID="-1" LogPortalName="" LogCreateDate="2006-04-27T21:41:50.5027712+05:30" LogCreateDateNum="0" BypassBuffering="false" LogServerName="SUJEET"><properties><property><name>AssemblyVersion</name><value>04.00.03</value></property><property><name>Method</name><value>System.Security.Util.StringExpressionSet.CreateListFromExpressions</value></property><property><name>FileName</name></property><property><name>FileLineNumber</name><value>0</value></property><property><name>FileColumnNumber</name><value>0</value></property><property><name>PortalID</name><value>-1</value></property><property><name>PortalName</name><value /></property><property><name>UserID</name><value>-1</value></property><property><name>UserName</name><value /></property><property><name>ActiveTabID</name><value>-1</value></property><property><name>ActiveTabName</name><value /></property><property><name>AbsoluteURL</name><value>/DNNTest/Default.aspx</value></property><property><name>AbsoluteURLReferrer</name><value /></property><property><name>ExceptionGUID</name><value>4920992c-b4a5-43d2-8de9-6749dac0de2c</value></property><property><name>DefaultDataProvider</name><value>DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider</value></property><property><name>InnerException</name><value>Unhandled Error: </value></property><property><name>Message</name><value>System.Exception: Unhandled Error: ---> System.ArgumentException: Absolute path information is required.
at System.Security.Util.StringExpressionSet.CreateListFromExpressions(String[] str, Boolean needFullPath)
at System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList)
at System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String path)
at System.Web.InternalSecurityPermissions.PathDiscovery(String path)
at System.Web.Caching.CacheDependency.Init(Boolean isPublic, String[] filenamesArg, String[] cachekeysArg, CacheDependency dependency, DateTime utcStart)
at System.Web.Caching.CacheDependency..ctor(String[] filenames, String[] cachekeys, CacheDependency dependency)
at DotNetNuke.Services.Cache.FileBasedCachingProvider.FBCachingProvider.Insert(String CacheKey, Object objObject, CacheDependency objDependency, Boolean PersistAppRestart)
at DotNetNuke.Common.Utilities.DataCache.SetCache(String CacheKey, Object objObject, CacheDependency objDependency, Boolean PersistAppRestart)
at DotNetNuke.Common.Utilities.DataCache.SetCache(String CacheKey, Object objObject, CacheDependency objDependency)
at DotNetNuke.HttpModules.Config.RewriterConfiguration.GetConfig()
at DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean
& completedSynchronously)