print sharing automatically turning off

Hello,

I setup a simple print sharing with a label maker. Everything was working
great, except recently every time the computer which has the label maker
connected to it logs off the print sharing is disabled. Without fail as
soon as you log back on and go into sharing it says "As a security measure
windows has disabled remote access to this computer...... If you want to
enable print sharing without the wizard click here". You just have to click
on enable sharing and it works, but that is a pain everytime you login. I
have tried uninstalling and reinstalling print sharing, removing the
printer, different printers, even keeping the xpsp2 firewall off, nothing
works. This has only just started, not sure what has changed.

Has anybody seen this?

Thanks, Sean