Q: MacBook Pro Wifi Connection Not Working

I have a MacBook pro for work. I took it home where I have Cisco Linksys password protected wifi (WPA/WPA2). When I enter the wifi password on the MacBook, I get a message saying that the password is incorrect. I disconnected the wifi on my PC and ipad to see if I was entering the password wrong, but both the PC and the ipad accepted the password and connected. Does anyone have any idea why the MacBook won't take my password and how I can correct the problem? Thanks!