I currently have 3 Macs. An iMac, a MacBook Pro & a MacBook. I can connect to my iMac from both the MacBook and MacBook Pro. I can connect to my MBP from my MB and vice versa, however when I try to connect to my MBP or MB it says I have entered the wrong password/user name when I clearly have not. Is there something I am missing? I even went as far as changing my PW on my MBP yet it still states that I am entering the wrong PW/User name. Any thoughts?

If it helps any, I am running 10.5.1 on all machines.