thanks cyrilpic, i think you’re right it´s a permissions problem…
if i clicked at the key i can see that only “system” can use it.
but if wan´t to change os x ask
1st for admin (because change the keychain)
and
2nd for another admin? could this be root?
at the end i can´t change the permissions for this key… (i think it´s a problem because i´ve put the *.p12 file by root (sudo tcsh) in keychain… right?)