Ok, I have some additional information. Seems that the Pineapple is not really freezing, but that there is a problem with the radio (?). If I move really close to the Pineapple (i.e. within 1 meter), the connection is picked up again. If I move away very slowly, the connection remains sort of stable, but I can only move about 3 or 4 meters before it loses the connection again (no barries between my PC and the Pineapple).
Tomorrow I will see if switching to another channel helps, maybe it's a matter of interference (?)
Any other thoughts?
Regards Rob