LS Fuel rail help

[dinos67's]

I just fired up my LS in the car for the first time and the thing just purrs. My question is I am missing something here when it comes to the fuel rail. I am running stock ls2 style fuel rail I had an o ring leak so I pulled the two bolts out of the one side and angled up the rail replaced the o ring and put the two bolts back in and now the back one is leaking also that was replaced. How should I install the rail? Do I lift the entire thing off and then reseat it the passager side is dry but the driver side has a leak. I am running my fuel rail up the passanger side of the car. Any help would be awesome thank you in advance.