HI -- I mailed my I-751 form on September 4, 2007 and I just realized that I mailed an expired form and the wrong amount. They issued an new form on 7/30/07 but I was too studid to double check the money amount and so mailed a check for $275 instead of $545. I can't believe I did this

Should I send a new application with the new amount or should I wait until I hear back from them? I have a VERY important trip planned for the first week of December and I'm afraid I won't get my Notice in time to travel. My residency card is expired so I know that I WILL need the Notice in order to travel.

What should I do???

Your advice is needed and appreciated!!