有用户在安装完URTracker后，打开提示：
Server Error in '/URTracker' Application.
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Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
LoadLibraryW(UInt16* ) +0
System.EnterpriseServices.Thunk.Security.Init() +76
System.EnterpriseServices.Thunk.Security.SuspendImpersonation() +81
System.EnterpriseServices.Platform.Initialize() +503
System.EnterpriseServices.ResourcePool..ctor(TransactionEndDelegate cb....
经查，是因为Kaspersky Anti-Virus 6.0.2.621与ASP.NET 1.1的冲突 造成的。需要把卡巴卸载或更换别的版本才能解决。
相关页面：
http://bbs.et8.net/bbs/showthread.php?t=851817
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1488072&SiteID=1