My iMessage won't let me use my email address

When I try use my email for iMessage it says it is already in use. I used it previously on my iPhone 3GS but I haven't been able to use it on my iPhone 5.Is there any way to cancel the account from my 3GS and get iMessage on my iPhone 5?

It should

Sounds like you have 2 Apple ID's

the old one - still attached to the email address
and a new apple ID
with a different email address

You will need to change the email address on the old Apple ID
(login to apple ID on apple site)
https://appleid.apple.com/...ctToSignIn
or just re-use that apple ID perhaps.

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