Help with button

[COLOR=#283a5e][FONT=Tahoma]Hi there. I hope that someone can help me with this problem.[/FONT][/COLOR]
[COLOR=#283a5e][FONT=Tahoma]I have attached a file with my problem inside. [/FONT][/COLOR]

[COLOR=#283a5e][FONT=Tahoma]Pratically, I have two button with a rollover state and rollout state, and after press, they do the action described in the “transition between external swf” tutorial".[/FONT][/COLOR]

[COLOR=#283a5e][FONT=Tahoma]Well, I would like that , when I press a button, it rest highlited, and when I press other one, the first turn back to the original state and the new one turn and stay in the highlited state.[/FONT][/COLOR]

[COLOR=#283a5e][FONT=Tahoma]Hope to hear from you soon. Thanks.[/FONT][/COLOR]