Using remote services (telnet,ssh) in Emacs 22

[Will]

Hi,

I'd like to use Emacs 22.1 with Windows XP to to work remotely with some 
servers via telnet, ssh etc. I've also installed telnet and openssh 
contained in cygwin. I am using the telnet.el library and some extension 
from http://www.khngai.com/emacs/cygwin.php.

However, I get the following error messages after entering M-x telnet 
RET <server>:
"Process telnet-<server> exited abnormally with code 255"

I have no problems accessing the server via telnet in the Cygwin shell 
without Emacs.

Who can help?

Thanks in advance,

Will