SLES 11 64bit
DataSync Build 115

We have 9 phones connected and syncing correctly (Droid 1, Droid 2, iPhone, Incredible, Droid Eros).

We are not able to connect any Motorola Droid X phones. Have tried 3 different Droid X phones, each give the same error: "Could not connect to server."

If I try the same user account that is failing on the Droid X on another phone, such as the Droid 2, it connects correctly.

Is there something I am missing with this model of phone? I have seen other success stories here in the forums with the X. I am currently baffled and accepting any ideas. Thanks in advance.