On the iPad, in DTG, did you use the "+" button (under the Desktop area) to see if you could establish a connection?
In addition, you have to make sure the desktop version is running. That part always trips me up - cause it shows in My Documents, but until I actually start it on the desktop side, the iPad won't "see" it.
IOW, what are the steps you are taking to see if the two are talking to each other?
Marilyn
P.S. And, I also moved this post over to the Help section - maybe you'll get more eyes on it...