Did you request to be sent a reminder back when you were still using your old address? I remember that one must enter one's e-mail address again. They can't extract it from the FT database automatically.
Also, if you subscribe to MilesLink (I almost typed TalkMail by mistake

) you might need to unsubscribe from your old e-mail and re-subscribe with your new e-mail.
Hope this is of help,
FewMiles..
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FlyerTalkers' Resources on the Web:
http://fewmiles.tripod.com/
Unofficial Guide to AAdvantage:
http://fewmiles.tripod.com/AA/
Unofficial
oneworld Info Desk:
http://fewmiles.tripod.com/oneworld/