Job failed by error logon of user failed when starting a step.............

Hi,

In our ECC6.0 system when I chekced in SM37 the job failed with the error that "logon of user JAGDE1B_LOG in client 200 failed when starting a step".As I have checked for the user 'JAGDE1B_LOG' this user is not locked also validity of the user is also there.User type is Dialog & user group is General Users.

Please let me knwo the way by which I can resolve it.

Regards

Nilesh.