Can't connect to secure internet, only non secure.

I cannot connect to my wpa secure wireless internet connection with dell 2300 pc, it will only connect to my neighbors non secure wireless connection. I’ve tried a Trendnet TEW-443PI wireless card, a D-Link WDA-1320 wireless card even a D-Link WUA-2340 rangebooster g usb 2.0 adapter. All three are doing the same thing on the dell 2300. I’ve reformatted time and time again with the same results. I have two other’s an asus desktop and an hp laptop that work excellent on my secure wireless internet. I’m using a D-Link DIR-625 Rangebooster N Router. Has anyone else have this similar problem, or any ideas on how to correct this problem.:’(