RAS PROBLEM

I have ras enabled on my server. I can get connected thru remote pc and when I then go to browse network I can see the other PCs . But when I try to acces any of them I get an error message saying either unable to acess pc or dont have access to it.Also when I try to access the server it asks me for a password. But when I put in correct password it wont take it. I always sign in as administrator .. thanks for any help