The requested address is not valid in its context

Hello, I have been trying to connect at my school (which may have nothing at all to do with the problem) and my rommate and I are going slowly insane.

My problem is that I receive this message :
"The requested address is not valid in its context."
as well as it resolves the site name down to the IP of 0.0.0.# (the number is normally 3-6).

Any ideas?

what's the format of the address you enter? usually, there should be no ftp:// (or even http://, which is of course unsupported) prefixes.

The form of the address is, ftp.address.com

I am aware that ftp:// and http:// do not work.