You will have her Elite status attached to your upgrade request until your flight is available for check-in. At that point your status with AC is the one that counts and since you don't have any (US*G doesn't count) you are pretty much at the bottom of the upgrade list behind all AC*SE, AC*E and AC*P.

Since you bought a flexible fare, I would try to change the flight to one that shows availability in R (if there is one).