STA disassociated from AP

After several hours of perfect operation , my STA´s are disassociated from AP with this code “Reason: 33 (GPFs MISS)”. I don´t know what happen. while the link its up the operation its ok, but when the STA is desassociated then i need restart the AP for the new association.

Can you help me?

I have epmp 1000 with firmware 1.4.1, one AP and two STA


This is a known issue in software release 1.4.1. Please upgrade to software release 1.4.3.
Look for item # 5751 in the 1.4.3 ePMP release notes.

Thank you, Corey.

I observed a similar problem comes out the same error … firmware is 2.1 How to be?