MacBookPro with airport extr. locks up iMac G4 sharing ethernet via airport

I've found that my MacBook (airport extreme) causes my 800MHz iMac G4 sharing an ethernet connection via airport (non-extreme) to lock up pretty regularly (i.e. the iMac locks up). The more data I'm transfering the faster it locks up. I also have a 1G iBook G4 which works flawlessly via airport extreme to the same iMac. The iMac is still on and the mouse moves just there is the spinning ball of death and nothing happens when you click anywhere. I have to force shutdown the iMac (hold the power button for 5 seconds) and restart.
Is this known? Is there a fix or do I have to wait for a firmware fix?
Thanks,
Ryan
MacBookPro   Mac OS X (10.4.5)   iMac g4 running firewall with "all" allowed on the airport interface

Hey thanks for the welcome!
The error message said " there is an error in connecting to ..."
OK ( after just checking it again) go figure - I turned off sharing ethernet connection to computers using airport on the iMac - and turned it back on and voila! I am now connected using the PB - ??? Must have been a reset issue?
lets see if this is a solid connection...
Thanks for the fast reply!
Pasquale

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