Kindly read this, it may help you.
When the software that lets your computer communicate with your PDA acts up, always check the cables and connections first. Is the USB (Universal Serial Bus) or serial cable connected securely to the PDA (or cradle) and the PC? Is the PDA seated properly in its cradle if it uses one? If everything is in place, visit the palmOne (www.palmone.com/us/support/downloads
) or Windows Mobile (www.microsoft.com/windowsmobile
) Web site and download the latest version of the HotSync or ActiveSync software that is compatible with your PDA and your computer's OS. Keeping synchronization software up-to-date is important because newer versions fix compatibility problems and usually add new features.
If you have a Palm OS PDA that uses a USB connection, sometimes incompatibilities exist between Windows and the software that you can resolve only by running a special USB utility found at the PalmOne download site mentioned previously. Select your hardware from the drop-down list and click the USB Registry Utility link. Download the USBRegClean.exe file, navigate to the downloaded file, and double-click the icon to install it. Reboot your computer and reinstall the Palm Desktop and HotSync Manager.