I'll start this by saying I have no connection with the support side of DW, I've been around a couple of weeks myself & am not good at these kinds of things, but maybe "2 heads are better than one"?

Are you getting an error or is just timing out & not uploading? What kind of system/browser are you using (not that I'd know what to do in that case but if someone else reads your question they might)?

Also, if you don't get any other replies maybe do an individual post to this comm to see if people more in the know about your problem respond.