[HELP] Match 3 game in development

I'm making this match 3 game on AS 3.0 Flash CS4 and I'm having this error:

TypeError: Error #1010: A term is undefined and has no properties.
at monsterQ/getMatchHoriz()
at monsterQ/lookForMatches()
at monsterQ/setUpGrid()
at monsterQ/startMatchThree()
at monsterQ/startGame()
at homeClass/startGame()

I'm not quite sure what did means. Can anyone help me? Thanks in advanced.

In your FLA publish settings, select "Permit Debugging" and it will show you which line the error occurs. Basically some variable you're referencing in that line of code doesn't exist at that point, you'll have to make sure you're creating it before that point or referencing it correctly.