Hi and welcome to the forums :>
If you arranged a perfect setup, I cant think of a reason it didnt work. Are you sure you didnt just expect too much? The differences you can notice are usually rather subtle, as a shift of mood/awareness/wakefulness. No drug-like feeling or alike (as stupid the other stuff advertises).
//Edit: Ha, didnt know we got a wordfilter in this forum... 'the other stuff'
For noticing effects at all, I suggest X-Zedrin.
The transition between the state of relaxation and alertness is pretty noticeable imho. Watch for the difference of how focused you feel when the frequency of the pulse ramps up.
And about the ganzfeld procedure: I havent tried it myself so far, but if you only 'bored' you eyes, its not enough. You have to work with your ears too - there is a ganzfeld mp3 on iso-tones containing only white noise for exactly this. Maybe try it again?
Once again, for all kind of procedures like these: Don't be too expectant of entertaining effects, I doubt you get full-blown hallucinations in a couple of minutes.