Can't change root password in solaris express 11

How do I change root password in SolarisExpress 11?

I used passwd while elevated to root and all it changes is the password of the user I am logged in, not te root password.

perhaps you should use 'root' as argument for passwd

Thank you, it worked.
I was sure that I tried it and it didn't work, but I went ahead and tried it again and it worked. So either I had experienced confabulation or I mistyped it the first time around.