'Object Method Failed'

I am receiving the following error when trying to sync Groupwise calendar
with a Palm Treo with pda connect 1.0 ( version that came with Groupwise 7
sp2 client)

"CRSyncUtil::LogFatalTransError : 'UpdateRecord()' API of 'GrpWse'
translator for 'Calendar' application returned error 'Object method
failed."

Tasks and notes synchronise fine, the only problem is the groupwise
calendar. It will to about 150 out of 300 records and produce this eeror
everytime.


I have the sync logs if they are any help...