Trouble with two tiered menu

Hi there guys, I read with interest some of the tutorials on this site and am trying to an achieve a menu system where the reverse rollout script is used. This works fine, but the code from this seems to be stopping any other sub buttons I add from working.

Can anyone help?

I’ll attach the fla if it helps.

Sorry If my explaination is a bit vague, I’m still struggling with actionscript.

Many thanks for any help.