Valve cover gasket leak?

[lsxavier]

I'm having issue with oil leak around the valve cover.I put a new gasket in there and it's still leaking all around.It leaks from all the around the valve cover not just spots.I followed the fsm on putting the gasket.I'm having this problem after i put the turbo in the engine.I have an s14 with turbonetics turbo kit.Any advice would be greatly appreciated.Thanks