to be really honest, you can't expect an ad block on ur site to automatically start getting clicks...u really need to wrk on its placement, design and other things. next, have you tried adsense? If you don't wanna use that, I'd suggest Bitadvertiser...has wrked pretty well with me since last couple of months
i used adbrite for several months and never made more than $2 a month so i switched to bidvertiser trying it out now
few days back I got 0.02 for 31 clicks..! When I contacted Adbrite, they say that its for the CPM ads. So, just see if you can disable CPM ads and go for only CPC.