installing wireless adaptor for V305 dell printer--having trouble

My printer is 4 years old. I purchased the adaptor Dell 1150 model LEX-m01-001 which Dell Sales told me was the correct adaptor for V305. I used printer installation disk that came with my Dell computer/printer. When I turn on printer the screen says "wireless adaptor detected". The installation/setup step ask me if the wifi light on printer is blue, orange, or grey. There is no wifi light on my printer though. When I first turn printer on a WIFI logo light comes on that is pink/purple but only for a second. I have selected blue and orange on different attempts anyway. Both with same results. The installation stops saying it can't connect. (yes, I have usb cord connected). I attached a wire from router to the adaptor and when I tried to print a document, there was an odd printer listed (series of numbers and letters) and I took cord off and then tried to select that printer. It worked 3x! But then my laptop and other devices (nook reader) couldn't connect to the router. I reset router but still no connection. Waited until the next day to think on it, and then it would not print again. Then uninstalled the printer altogether. When I tried to reinstall from disk I got error messages saying the driver was against my policy settings...don't know what that means. But now I had no use of printer at all. I had a backup of my computer from the previous day and ended up restoring my computer to the previous day before I had uninstalled the printer. So now I can print with cord, but still can't install this wireless adapter. I have one week...until next Monday before I can return it. Help!!