AppleCare question

[sigmend]

I bought the apple care plan with my g5 and LCD. When I went to register it gave me an error like "Could not complete enrollment please try again" or something along those lines. So I try again and now it says my apple care sn is in use..
so what should I do here?
How can I tell if I am registered or not?

 

[gigglebyte]

call 800-275-2273 and have us check and enroll if needed