WE are Both hard wired to the computers, it is only with large files 1+ gigs in size. sometimes she can get them and more so not than so the transfer times out. i have the settings in the configuration page set to 10 min timeouts as you have said. it already takes about 45 min - 1 hour to transfter 1 gig+ both computers are running windows 7 not sure what else to do i have come across other forums with the same issue but they are a bit old so maybe dlink never fixed the issue? still open for suggestions.
http://www.google.com/search?source=ig&hl=en&rlz=1G1GGLQ_ENUS250&q=transfter+large+files+dns-323&aq=o&aqi=&aql=&oq=&gs_rfai=