3-5966151951: Patch 11817843: FAILED: file WFXLoad.class on worker while applying a patch

Hi,
Apps 12.1.3

Applying patch 11817843:R12.PRC_PF.B
Log shows..
FAILED: file WFXLoad.class on worker  1

Telling worker to read todo restart file.
Done restarting worker.
   Fixed: file WFXLoad.class on worker  1 for product fnd username APPLSYS.
Time is: Tue Jul 17 2012 20:26:00


adwoker03 and 04 shows
to APPS......Connected successfully.

Connecting to APPLSYS......Connected successfully.
Connecting to APPS......Connected successfully.
Ready to run jobs.

Asked customer to restart workers using adctrl.
"When the worker is fixed using adctrl, patch applying jut hangs and not seems to be continuing. after waiting for some 5 to 10 mins when i check the worker status it says failed.