Problem while deploying WD application thru SDM

Hi friends ,facing problem while deploying webdynpro application on SDM.It takes much time deployment but for the past 1 or 2 day its not working properly ..i..e error is coming while deploying WD application................................................"Cannot login to the SAP J2EE Engine using user and password as provided in the Filesystem Secure Store. Enter valid login information in the Filesystem Secure Store using the SAP J2EE Engine Config Tool. For more information, see SAP note 701654.."

If how know how to resolve this then waiting for ur response..

Thanx in advance

Hanif