When I try to logon to iMIS desktop client it comes with blinking screen error.

Server Error in '/iMIS15' Application.

The login token provided by iMIS Desktop is not correct; check for mismatches between the Hashkey and EncryptionKey values in System_Params and SystemConfig.

Description: An unhandled exception occureed during the execution of the current web request. Pleae review ...
 

Please help! Running on iMIS 15.1.1.3286 desktop client
Thanks,

Tim