How come I got 0 credit?
I looked and the WU you got 0 credit for showed up as Invalid here http://lhcathome.cern.ch/result.php?resultid=2074445
This still don’t explain why your result was invalid, but why you got 0 credit. It did mention in the FAQ’s about problems with overclocked CPUs, Of course I dont know if thats your case but thought I’d mention it.
also an odd way of granting credits- 
"If work unit has 10 successful results but there are not enough identical results, the results are granted points according to how well they match with other results. The best-matching result will receive median average of claimed credits (calculated in same way as the canonical credit). Other results will get credit proportional to the best credit and result’s match points. Although users get credit from this kind of results, the results are not used in physical studies. "
odd.
Not overcloecked majorly.
In fact it’s only overclocked by 6MHz on the FSB…