No boosting. EQs are not amplifiers. You need to isolate where your kick's sweet spot is. Sweep your EQ until you find the spot where the most important part of the kick (the thump and low end) is pretty much all you hear. Most of the drums I use have a sweet spot somewhere between 120Hz-160Hz. You should be able to find it with a very narrow (no more than 1 octave) band-notch. Make a note of the freq, return it to zero, then
don't boost any of the kick. Go to your bass track, and
cut the freq about 3 dB or so with a notch at the freq you found with your kick drum. That should put the bass 'under' the kick for lack of better description. The problem you're having is b/c of the boosting. It's like you're asking your system to accentuate and highlight two separate things, which is bad enough, but with bass and kicks, it's like you're trying to highlight and accentuate two things that are in the same spot, doing almost the same thing. If you're going for hip hop or radio pop, the drums are almost always the most upfront part of the instrumental, since it's the part that requires no musical inclination to appreciate.
I'd pretty much always say not to boost with your EQ. Ever. If you want to 'boost' a certain freq, cut the freqs you don't want a little and then turn the entire track up.