kitchen faucet to supply line

[kyleam01]

I am having a problem attaching my cold supply line to the faucet. I have the shut off valve installed at the bottom through the floor with a supply line coming up towards the sink. I have the compression ring and coupling nut attached to the supply line. From the faucet, I have attached a flex line with a 1/2 outlet. How do I connect the two? I tried using a shut off valve to connect them, but it leaks where the hose meets the flex line nut and not in any of the threads. I'm stumped.

 

[SlowDrip]

I'm really tired, so bear with me, but I can;t seem to picture what you are describing.

The most common setup is 1/2" type M copper coming out of the floor or wall, a shutoff (either soldered or 5/8 compression) attached to it with a 3/8" compression end pointing upwards. Attached to that is a supply line with a 3/8" end on the bottom and the appropriate end at the faucet end (usually a 5/8 but possibly a 3/8 or some odd proprietary end).