The only thing I can suggest is maybe rebooting both zaurus and phone.
Yup, tried that one - no joy. The same device had Cacko, didn't work, got rebooted many times. Went to OZ - worked ok. Went back to Cacko - still not working.
I have a C1000 with the same setup, different phone and it's all working lovely. I can't see any different between the two setups.