Publication 'Scheduled for'

Hello

We are running BI 4 SP4 P 6.  We are trying to create a publication and use the Schedule for option.  The webi report is against a BEx query and the authentication method is SAP.  The user for the schedule for option is a generic id that we have created in both BW & BI4.  However when the publication executes, we are getting the following error:

2014-02-04 11:01:49,834 ERROR [PublishingService:HandlerPool-5] BusinessObjects_PublicationAdminErrorLog_Instance_889721 - [Publication ID # 889721] - Scheduling document job "Cost Center Owner Report (scheduled)" (ID: 889,729) failed: Cannot connect to the olap source

com.businessobjects.mds.olap.OlapException: [Internal] SSO token or User password is empty.

[Internal] SSO token or User password is empty.

Any help and guidance is appreciated

thanks

Frank