I set up a DI-524 for someone a few weeks ago. I upgraded the firmware, then connected with my X3i, and the internet connection was fine. If you'd like, take a look @ the document that I put together on the DI-624 and the Axim. You can find it it
here
I put this doc together because I noticed quite a few folks with DI-624 issues. The 524 is very similar, so give it a look, maybe it will help . . .