From what I've found out, the model you have is not supported by the manufacturer. It's not listed on their web site.

It's also a model with a serious security flaw:

http://www.google.co.uk/search?q=Edimax+AR-6004%2B+configuration&hl=en&lr=&start=0&sa=N  

Unless another owner shows up, it might be difficult to get the help you want on this one. You also might consider buying a better model in view of the security risk.

Dave