Oil Pump Leaks…

Well guys, I finally have a running project, but it had an oil leak at the pump gasket. Yesterday I tried to make a new gasket for it. I cut a hole for the shaft and a slit to fit around it since I couldn’t get the pump all the way out. I rubbed some oil on the rim of the pump and pressed the gasket material onto it to get an outline of the shape and I then cut the shape out with an X-Acto knife. Then I ran a bead of gasket maker around the whole thing and pressed it onto the pump, bolted it all up. Now, it leaks WAY WORSE. And I can’t figure out why? Please help me guys I have a pool of oil under the car now. I want to start driving it but it’s just fighting me every step of the way. Could it be because I went with the medium thickness gasket material instead of the thin one? The guy at the store seemed to have his doubts when he saw I got the medium one.