That is odd. When I connect mine to my pc first it will sync but when I open ICS I can hit connect and ICS will connect and it won't disconnect until I unplug the cable or I hit disconnect. I am running my own 6.1 rom though. Which rom are you using? Maybe you should check the registry and make sure the ICS reg edits have been made. Check this post for those edits:
http://forum.ppcgeeks.com/showpost.p...8&postcount=42