Unbinding max objects

Hey everyone,
Working my way through theMax pattr Tutorial 1 and when it comes to the exercise of removing the number box's (located near the metro on the left hand side of the patch) scripting name from temponum to something different, so that the pattr object is unbound to it. I can not seem to get this to work, when I click on the different message boxes to the right of the patch to change the speed, the number box still changes its value.
What am I doing wrong here? I know you can go into the inspector of the pattr object and change its bound name but I thought you can change it in the number boxes' inspector box too.
Cheers