New BB Code in quick reply?

[OurCouponHome]

How do you enter new bb codes in quick reply? I thought I was doing it right but now have red x's where the pictures should go.

--------------- Added [DATE]1297794466[/DATE] at [TIME]1297794466[/TIME] ---------------

Nevermind! I figured it out!

[Videx]

That's not very helpful to future searchers. You should explain it, even if you think it's something everyone else already knows.