Sshd service in WindowsXP

Hi,

I've been using openssh in windowsxp pro for a few months with no
problems. Then one day I couldnt connect to my machine. I logged in
locally to investigate and the opensshd service would not start.
I've reinstalled opensshd a never of times but now it doesnt even show
up as a service in windows services. So from the command prompt when I
try to start the service it says "Service name invalid" or something
along those lines.

Any help appreciated?
Patrick.

.