oil filter housing leak

I changed the OFHG last year when I did the Vanos and replaced the VCG, and I now have a ridiculous leak. I see there is some small seepage in the back corner of the valve cover, so I need to re-torque that, but as for the oil filter housing, the propblem clearly seems to be that the cap for the...

This started after doing the oil filter housing gasket project...the gasket that goes between the block and the oil filter housing assembly. Now it is leaking from the oil filter cover, as in where you slide the the actual oil filter out. It seems like I screwed something up and perhaps...