[CryptographicException: Bad Data.
]
   System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr) +33
   System.Security.Cryptography.Utils._DecryptData(SafeKeyHandle hKey, Byte[] data, Int32 ib, Int32 cb, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode PaddingMode, Boolean fDone) +0
   System.Security.Cryptography.CryptoAPITransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) +319
   System.Security.Cryptography.CryptoStream.FlushFinalBlock() +30
   System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Boolean useValidationSymAlgo) +159
   System.Web.Security.FormsAuthentication.Decrypt(String encryptedTicket) +247
   DotNetNuke.HttpModules.DNNMembershipModule.OnAuthenticateRequest(Object s, EventArgs e) +2939
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64