Lost my Darkflight racial skill.

HI im a warrior worgen with 90 level, and i lost my Darkflight racial skill. im searching into my spellbook in general and its simply disapered. Someone can help me. Thanks

Try making a macro that says /cast Darkflight

alredy did, and doesnt works. I dont know what happened!!!

Yeah, that's definitely one of the weirder bugs I've heard of - tested it on my worgen just now, works fine.