I have had my X51V for about a week and a half now. Dell was generous enough to replace my X50V when I complained that it wouldn't run WM 5. Initially, I could not get it to sync with AS 4.1. I called Dell and they told me to remove and reload 4.0, whcih I did. Ugh, BAD ADVICE! That didn't work either, but after searching this site and others, I found that perhaps the 4.2 Beta version of AS would work, so I loaded it and voila, it worked great. Last week I loaded the Beta version at the office and both home and office synchronizations worked well. Today, I came into the office and when I cradled my Axim, it took forever and a day for the Calendar to synchronize, although it eventually did. Any clues as to what's happening?