app and device policy stops working

I have a windows XP machine, I applied the application and device policy to disable USB drivers. I have printers and scanners excluded.

This machine was working perfectly fine, no issues for at least 6 months with the same SEP policy.

I get a call stating the printer has an error, after troubleshooting it (reinstalling drivers, remove software...) and still did not work, I decide to change the USB cable.

When I replace the USB cable, the SEP policy blocks it.

Printer and workstation are the same, policy is the same.

I move the workstation to a different group without the app & device policy, and it works.

Nothing has changed on the sep side(I am the only one that has access to SEP).

Any ideas?

Thanks,

Joseph