Replacing the oscillator caps is the usual thing that everybody does to get these working, but the resistors in the circuit should also be checked. Have you tested any of them, including the pots?
Are you sure the new tube is ok? Have you tried it with the old one back in the circuit? Have you taken any voltage readings on the tube? Are you sure that there is voltage getting to the tube? Is the heater lighting up?
And finally, have you double checked your work? Are you certain that the new caps are all installed correctly and solidly wired, etc.