Trendent TEW-423PI card on Win7 64bit not connecting to the network..

Hi guys iv upgraded my system to Windows 7 (64bit) and had to get a new network card as there were no compatable drivers for my old one. Iv now got a Trendnet (Trendware) TEW-423PI wireless card which works perfectly with my xp system using the most up to date drivers from the website.

With Windows 7 however im having no such luck. Iv tried the most up to date drivers from the website, iv then tried uninstalling the connection software leaving only the drivers. That worked for a day but the following day when i switched it on it couldnt connect to the network. I tried reinstalling the software and drivers again etc as previous but still the same outcome.

Iv confirmed that my computer is part of the home network as found on other threads,
Iv confirmed that the power cannot be turned off by windows,

Iv got Nod32 installed, iv not tried removing it....Is this worth a go? Any suggestions would be appreciated, i just cant understand why this is such a hassle. Why do they release a new operating system which is so difficult to get compatability. Iv read that this card does work but people do seem to get this problem.