how can i fly in a dragon mod i really need help everytime i try to fly my game crashed what do i need to do with out crashing my game any ideas??

It might help asking in the thread specific to the mod you are using at the place you got the mod.
gamesas does not offer support for problems from user made mods, normally.

If you are using http://skyrim.nexusmods.com/mods/25261 mod, I suggest you ask there.