[amsat-bb] Help!!

I have been inactive for awhile but am now ready to get back on the birds. In the meantime I changed from an older computer running Windows 2000 to a newer, faster one running Windows XP Pro. I am using SATPC32 with a Yaesu FT-736R and a LVB Tracker with a Yaesu 5500 AZ/EL rotor. Things are set up as far as I can tell the same as they were before. My rotor control works but the cat control doesn't. I am hoping there is some little thing I did before that I am forgetting to do now. PLEASE, any ideas?

Al, W8KHP