Can any of you help me?

On Sept 23, 1999, I signed up online for a double miles offer at the UA website, but I neglected to note the code number for the offer (fool!). I have traveled on United during the time slot indicated in the offer (see quoted text below) but have not received my double miles. I really would like those miles! Anyone know the code number so I can report it to Mileage Plus?

Many thanks.


"You'll receive double miles for each segment you fly in any class of service. There's no limit to the number of times you can receive this bonus during the offer period. Travel must be completed by March 31, 2000. This offer is not combinable with other current Mileage Plus bonus offers. Valid only for tickets sold in the United States. Offer subject to change without MPlusnotice. Other restrictions may apply. You must register for this offer to earn the bonus."