Button state -- disabling already clicked one

please help, it very urgent for the jeopardy game:) for the orientation of the new staff, they are currently using powerpoint(which is ok but I would like to make it better and more lively)

so I have 25 buttons, each button is clicked and user is transferred to ANOTHER frame in the SWF file where he sees the question.
once the question is read/answered (orally) user presses the home button and is being returned to the frame 1 of the original movie.

what I would like to achive is to disable the button clicked.

for example user pressed button “100$” went to the question corectly/incorrectly answered it and then went back to the main screen here he sees a row of buttons with 1004, 200$, 300$ etc buttons on it.

AND the clicked one “100$” is already disabled", similarly when he clicks the
“200$” buton same thing happens again.

how to do it?

I have tried on (release) {
_root.TargetButton1.enabled=0;
}

but it only disables the buttons with no links to others frames

once the button has links to other frames buttons act like they haven’t been disabled

PLEASePLEASE help