I have 3 servers all running solaris 9 using ssh
I changed the root passwd on all 3 a few months ago.

I cannot log in as root currently as it wont accept password.
I try to su from another user to root - when I type the password that I know to be correct it rejects the password immediately (no delay) with error su: sorry

If I type an incorrect password it takes several seconds to return to the prompt..
I think the password I am using is correct but something else may be wrong.. No changes made - only other thing it could be to do with is password again or expiry...

Any suggestions - I am in desperate need of help as I cannot log in as root on any of these servers as a result...