I kinda have that problem too. I pull the release handle and nothing happends. I can go and pull up on the hood and then it will open( only after I pull on the release handle). Try doing that. I might have to pull the release handle a time or two before it works but it will always work.
2004 f350 6.0L psd 4x4 6spd cc sb dark shadow gray, sct tuned by eric, 6" ICON 20x12 centerline, 35x13.5 mickey t atz
Even though it sounds like the cable is moving, it could be broken off somewhere in the line which is causing your problems. How long are your arms? If you removed driver's side wheel and wheel well do you think you could reach up there to manually pop it?