multi instrument problems

[krazyace88]

ok so heres my issue, i want to play guitar and do vocals at the same time. i have a mic stand and everything and i sign in my XBL account on one instrument and a guest on the other, and it works fine xcept when i want to play online, i cant hear anyone and no one can hear me when i have the guest signed in or somthing. ive tried everything to fix it but nothing seems to work! plz somone help me out:confused:

[Frederf]

Center-aligned post text... that's a new one on me.

When you use a guest account online with XBLive! voice chat functionality is completely disabled for that XBox for the duration of the session.