shareing network setup in home computers

Have 2 openSUSE 11.1 computers at home and having difficulty allowing my Document folder to share with the other computers at home.

When I open up the share tab and try to setup I get an error message “‘net usershare’ returned error 255: net usershare: usershares are currently disabled”

How can I correct this so I can share the folder with other computer?

thanks,

gychang