I had this trouble when my 07 was still very new. The bars come with a little 'torque wrench' and I had never exceded the limit (though the dealer who sold me the car may have?). The bars gradualy became very hard to move as the fitting that pushes down to let them slide became so deformed that it would not release. I believe it is a design fault, as the new galaxies have a different fitting and tracks. I had to buy a new set of bars and persuaded Ford to give me a better price for them, than the originals which I bought as an optional extra. I think you will just have to carefully wiggle and pull, trying not to damage the track, until they come free, then not fit them again, as they will just jam up again. Good luck with them.