Padding is invalid and cannot be removed. 一直提示这个 怎么解决？

这段时间，我服务器的事件里面都是以下这个错误警告，哪位高人知道这问题出在哪吗？

 

 

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 2009-2-13 10:41:35
Event time (UTC): 2009-2-13 2:41:35
Event ID: 25a4032267154e10890667f789702ac0
Event sequence: 385955
Event occurrence: 32
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/74852490/Root-1-128788986087968750
    Trust level: Full
    Application Virtual Path: /
    Application Path: D:/web/hallroot/
    Machine name: Z-7E242AD3649E4
 
Process information:
    Process ID: 2756
    Process name: w3wp.exe
    Account name: NT AUTHORITY/NETWORK SERVICE
 
Exception information:
    Exception type: CryptographicException
    Exception message: Padding is invalid and cannot be removed.
 
Request information:
    Request URL: http://hall.91mq.com/WebResource.axd?d=ZGPCPHPm5o3Os27jBrIjHN3N-YALe_XBB_UEY1JH-941&t=633447358138125000
    Request path: /WebResource.axd
    User host address: 122.235.143.227
    User: 
    Is authenticated: False
    Authentication Type: 
    Thread account name: NT AUTHORITY/NETWORK SERVICE
 
Thread information:
    Thread ID: 1
    Thread account name: NT AUTHORITY/NETWORK SERVICE
    Is impersonating: False
    Stack trace:    at System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast)
   at System.Security.Cryptography.RijndaelManagedTransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)
   at System.Security.Cryptography.CryptoStream.FlushFinalBlock()
   at System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Boolean useValidationSymAlgo)
   at System.Web.UI.Page.DecryptString(String s)
   at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)