AWB4001 Access Points Problems

I have 2 access points: AWB4001 connected in an network. They are configured as AP with same ssid.
Both AP are wired in our lan. Our wireless clients seems to be able to connect to access points and communicate with our wired machines. Problem occur when we use a pc connected via wifi and we try to connect to an wireless client then the connection randomly drops, we can ping the wireless client from the AP web interface but not from the pc. Tried to power down one of the access points and only use 1, then the problem seemed to disappear. Any ideas, configuration etc.

I would highly recommend opening a case at because you may need to work directly with the Anybus team in your country.