Palm Zire And Palm Desktop Osx: Month View Does Not Open


I can't open month view in either my handheld (Zire, palm 4.0) or in Palm 4.2.1 for Mac OSX. I have uninstalled and installed the software again, but to no avail. It opens in day view, then it crashes when i try to switch to month view. Possible problem might be that I recently synked with another computer? Please help me. I have not lost data, fortunately. synking takes 30 minutes, whereas before it took a few seconds.