Error during the retrieval of the logon data stored in secure store

Hi,

after a system copy from PRD to QAS, I tried to reconfigure the Transport Management System and got the following error message when adding the QAS system to the transport landscape:

RFC communications error with system/destination DOM_CTL

An RFC error occurred in the TMS communications layer.

   Target system: DOM_CTL.(000)

  Function: TMS_CFG_CREATE_A2D_REQUEST

  RFC message: Error during the retrieval of the logon data store

Error during the retrieval of the logon data stored in secure storage.

What should I do to correct this?

Transaction SECSTORE doesn't show any relevant errors...

thanks

Antonio