I would keep on trying with the F/T.
Are you feeding it in another cage?
Is the other cage heated?
Do you let your corn roam around a bit in the new feeding cage so it is used to where it is at?
Then do you let the thawed pinky on top to fill the cage with its smell to "prep" the feeding that way. Also I do know some pinks are pretty big try to find the smallest one ya can at first.

When was it last fed? how long have you had it? .. oh the questions.. ha ha..