hmm ... I just rip on my rico, and it doesn't have any problems with feeding, except when the battery is nearly shot ... even then it feeds, just much slower. Have you broken any paint in there that might have gotten into the motor or something? Maybe your sensor is shot.
Ricochet has excellent customer service, get ahold of them and they might know what's going on, and send you replacment stuff if that's the problem.
In the land of the blind, the one-eyed man is king ...