A couple things you might try, but first did you remove the software programs that came with the cards that you've been using.
That link provides a driver file that unfortunately comes in the form of a cabinet file (.cab) you will need to use some third party software like 7zip from here
http://sourceforge.net/projects/sevenzip/
Place the downloaded cabinet file into a new folder on your desktop, then after having installed 7 zip, you should right click it and from the context menu choose 7zip --> extract here. This should provide four files (athrextx.cat athrx.pdb athrx.sys and netathrx.inf) then open device manager.
Right click the wg311t and choose update driver software
Choose "Browse my computer for driver software...