Firstly it looks like your clients UA has been altered in the past, i have two suggestions you can try right now, firstly change DA in your list to something like DA1 and ask him to try, if that doesn't do it try altering Net Extractor to NET1 Extractor, these are the only things i can see may be a problem, if that doesn't work i'll look at it more in depth but in the mean time your user can perform a UA switch by following the instructions here
http://whatsmyuseragent.com/SwitchingUserAgents.asp