Error when scheduling a report (QE-DEF-0285 The logon failed.)

[pjammy]

Hello,

We use cognos 8, trying to schedule reports run. but get this error
QE-DEF-0285 The logon failed. QE-DEF-0321 The userID or password is either missing or invalid. RQP-DEF-0068 Unable to connect to at least one database during a multi-database attach to 1 database(s) in: ODS UDA-SQL-0031 Unable to access the "ODS" database. UDA-SQL-0129 Invalid login information was detected by the underlying database. ORA-01017: invalid username/password; logon denied

Note:
when i run the report immediately it runs just fine, also when i do a test connection on the datasource(ODS) it says suceeded but when i schedule a report to run i get the above error ;(

Please point me to the write direction, as am new to cognos

Thanks in advance..