Remove PEX Tubing?

Can someone please help me out... I've used a de-crimping tool to remove it from a fitting... I've cut through the fitting, however the PEX still seems crimped to the fitting. Is there an easy way to get this off? I'll settle for anyways b/c I can't seem to pull it off and I've pulled pretty hard using pliers! Thanks in advance.

Heat will remove it.

Did you cut the crimped ring in only one place? I have had to remove very few crimped PEX fittings and I cut them at three or four places around the fitting. A little wiggle and they have come off. The heat is a good suggestions also.