hii,
I get the problem to acess root password when i am in user login,
means wahen i am in user login and want to install software from terminal then he asked root password, when i supplied root password but he give me login incorrect.
what should i do?

What do you mean that you can not become su or sudo ?
Installing software should be done as root or su or sudo

Are you certain you are entering the correct password? Check you logs in /var/log/messages and see if more details are given.

Another thing to check is whether you are using a different locale setting than the root user. The character codes entered could be different due to different locale settings. (One user on this site had problems opening an encrypted pdf file due to this problem.) Try to log into one of the virtual terminals as root and enter the command "locale". Log into another virtual terminal as a your regular user and enter "locale" again. Also try using "su" or "sudo" and see if the password is accepted. Does the same problem occur?

Also try changing your encoding settings for the terminal.

If they are different you could try preceding the command by defining the LOCALE variable. E.G. "LC_ALL=posix sudo zypper install fam".

Also try using your systems graphical software manager and see if you can install the package that way.