cannot start application server

using aix 6.1 with oracle db ent 11.2
peoplesoft tools 8.51 fscm 9.1

have gone through steps for creating env dmo & sys. was working at one time. But after rebooting the server several months later i cannot start either dmo or sys application server. getting the error message:

PSAPPSRV.22216862 (0) [10/24/12 14:27:13](1) GenMessageBox(200, 0, M): SQL Acces
s Manager: File: SQL Access ManagerSQL error. Stmt #: 2  Error Position: 0  Retu
rn: 404 - ORA-01017: invalid username/password; logon denied
PSAPPSRV.22216862 (0) [10/24/12 14:27:13](1) GenMessageBox(0, 0, M): Database Si
gnon: Could not sign on to database F9DM with user VP1.
PSAPPSRV.22216862 (0) [10/24/12 14:27:13](0) Server failed to start

i can connect to the db using people db account and have verified the VP1 account is listed in the psoprdefn table