Need help using tuner plug-ins in X2

So, I just noticed that apparently the good old cakewalk tuner is now missing from my plugins list. No big deal I thought, I'll try that Gtune free vst thingy. Doesn't work, nothing comes up. No big deal I thought, must be cause it's 32bit, I'll try the tuner that comes in my guitar rig 4 instead. Doesn't work, nothing comes up. Tried on an audio track instead of a synth track, and tried turning on input echo, still nothing. There's something simple and obvious I'm missing here that makes my sonar refuse to give me tuning information during playback - what is it, fine bunch of lads? Cheers

Oops, right, I'm on X2 producer and windows7 64. I updated my Gtune to the x64 one, thanks for the tip. Still doesn't work, however, and I made sure to test it on an audio track with mono interleave and input echo on. The good news is that the TH2 tuner does work, I had not thought of trying that. Puzzling, but it's a solution. Oh good lord, just realized I'm not even in the right forum, silly me!