Yeah, bud, as a few members have already told you a VAC disabler on disables VAC. If you used detected hacks, or any hacks for the matter without a disabler, your either clueless about disablers, or you're a moron.
If you get a new key, please refrain from using hacks, except for external programs, without a disabler. You can use VAC_chaos. I can't give you the link but here to send you on your way.