Problem w/ access of Telnet issues

In order to obtain Genkey:
My computer is Vista, Anyway…
I typed: Telnet 192.168.x.xxx 8080 and computer reply say…
““telnet” is not recognized as an internal or external command, operable program or batch file”

What went wrong? did i miss something here?
thanks

Bingo!!! I got Genkey is cuz i tried on my wife’s XP computer… it’s worked… Vista seem not help anything!!!