I am having a problem syncing calendar items on my blackberry 8800. It has been working fine until 2 weeks ago. Since then it gives me the error: java.lang.illegalargumentexception and stalls. I have rebooted the phone and tried deleting a few calendar items but no luck. How should I fix this?

Thanks,
Mark

OK thanks, I have attempted to follow the instructions to reset the calendar collection. The first step is to unselect calendar from sync settings and save. This is not working... I can unselect calendar but when I try to save it merely sits there. I have tried to select save from the main screen and from the popup menu. No effect at all. I am forced to cancel out. I have tried pulling the battery and trying it again. No help.
Current version is 4.0.17 should I try upgrading to the 4.0.25?

OK, I have completed a complete uninstall of astrasync and reinstalled after a reboot. I was then taken through an account setup. Once the account was verified I was asked to choose the sync options. This is where I ran into similar problems as before. I decided to just select the calendar for sync, then attempting to choose next no progress occurred. I could not select next. This as I say was similar to the trouble I was experiencing when it would not allow me to unselect calendar from the sync options and save. That is where I sit at this time. Please advise. Call me at (I have removed your number to protect your privacy((Admin).