Question WLAN problem

Hi everybody,

I have a very specific problem with wlan.

What do we have:
We have CISCO accesspoints. Configured to use with leap. One of the leap setting is "PPK" aka "Per Paket Keying".

What is working:
We have Blue Angels with leap connected to the AP's and they are working like a charm.

What is'nt working:
All devices after the Blue Angel. Currently i am trying to get a P3600 working but with no success. Both devices are configured exactly the same.

My question now:
Is someone here which got this device working with leap an the "PPK" feature ?