We need more information. What model Raspberry Pi? What OS (image) did you install? Are you using WiFi or a direct ethernet connection? Provide the exact steps you tried and provide any and all exact error messages that appear.
It is almost impossible to provide too much information.
I think OutSourcedGuru may have nailed the problem...
If he's spelling "raspberry" without the "p", he's always going to be spelling the password wrong, whether it be on the network, or locally. And if he's got 3 that all exhibit the same problem, I think I would start with the simplest solution
When you type the password, try spelling it "raspberry" instead of "rasberry", and see what happens