Hi all
Many thanks for your input and help (especially Barry) with this matter. I have just returned from a week in China this evening, but was following the posts, whilst away.
I was in e-mail contact with Arnis Kakitis at Edimax Tech Support on a daily basis from Monday through Thursday. He was most helpful and a quick responder, and concluded that my unit was faulty. I was somewhat sceptical as Barry and others had experienced the same problem as me. Anyway, I ordered another EW-7711UAN from the same Amazon supplier from which I purchased the first. The dongle arrived whilst I was away so I tried it this evening, not expecting much in the way of success. I have been pleasantly surprised, the new dongle works with the PC in wireless zero (driver only) and with the Edimax connection software, and it also found all the SSIDs available to my other wireless network devices, and connected straight away with the HDR FOX T2.
Clearly there is a problem with some of the dongles, although Arnis did advise that Edimax were not aware of any customer complaints concerning this matter.
Neil