Hello,
Not sure if I can help as I see the post's a little old so hopefully you're already up and running. Anyway, if you're still having problems take a look at this page on my website that might offer a little help;-
http://www.sussexastroimaging.co.uk/page51.htmOn the page I show a step-by-step guide of how I connected an LX200R, PHD Guiding and a Meade DSI. If you've not already got it sorted then it might help.
Take care and good luck.
Justin
www.sussexastroimaging.co.uk