Never used a Rabbit skin with a Ferret, is your Ferret one of this years kits?
if so, it will still be immature, and wont come into its best till next Season.
I have a Jill here that was never out in its first Season,it was just well handled and looked after.
Took her out first time this Season and she went like a train, bolting Rabbits.
She was from a very long line of working Ferrets, so I had no worries about her working abilities.
If its a Kit, you can persevere, or try and get hold of an experienced Ferret for the Season, but this wont be easy.