May have screwed up installing new cam. Need help!

OK, turned the timing mark on the damper to 0 and it's pointing to #6 on the distributor. However, I also hooked a compression tester to #1 and got no reading on it at all after 2 full turns. This doesn't seem right as it was a running engine before I installed the cam. I thought for a second maybe the rockers are loose but it should still build compression even with that.