SQL Server - error en job para un dts

Tengo un error al proramar la ejecucion de un DTS, pero cuando lo ejecuto de inmediato funciona, este DTS carga datos desde access a sqlserver.
el error es este:

Executed as user: CHLEND04AP02\SYSTEM. ...ng... DTSRun OnStart: Drop
table HISVAC Step DTSRun OnFinish: Drop table HISVAC Step DTSRun
OnStart: Create Table HISVAC Step DTSRun OnFinish: Create Table HISVAC
Step DTSRun OnStart: Copy Data from Results to HISVAC Step DTSRun
OnError: Copy Data from Results to HISVAC Step, Error = -2147467259
(80004005) Error string: [Microsoft][ODBC Microsoft Access Driver]
The Microsoft Jet database engine cannot open the file '(unknown)'. It is
already opened exclusively by another user, or you need permission to view
its data. Error source: Microsoft OLE DB Provider for ODBC Drivers
Help file: Help context: 0 Error Detail Records:
Error: -2147467259 (80004005); Provider Error: 1032 (408) Error
string: [Microsoft][ODBC Microsoft Access Driver] The Microsoft Jet
database engine cannot open the file '(unknown)'. It is already opened
exclusively by another user, or you need permission to view its da. The
step failed.

ante cualquier ayuda muchas gracias