Ok guys i found it, it's that little "+" that makes you save the cr2 with morphs included. but what i noticed in the library is that there is .cr2 and .pmd (i'm talking about poser6)
the morphs that i have created are located in .pmd and not in the .cr2, i did some research on several forums until i found how to get rid of it : just go to edit and uncheck "external binary morph target". 
This is just a tip for those who want to make morphs of their own. thanks a lot for your response