I had been using WM for a few years on my BB. Several months ago I switched to iphone and had a similar problem with it feeding/syncing w my calendars. I contacted WM via email and they were great in helping me trouble shoot. It works great now, sorrry I don't remember what I had to do to correct it but can vouch for their techhelp services.

BTW, I've love WM -I have Gold edition, but have always wondered about Tripit. As you have both, what does one have that the other doesn't, or better put, why do you use both?