Perhaps you are using the wrong method. A lot of spells here were written for the caster, of course (because they wrote it). You know how we always say, "Whatever works for you," etc? That is because, we all know that sometimes spells are attuned to other's energies rather than our own. So it is common when we use somebody else's spell, we change things around depending on what we know works best for us (attunes to our energies). I suggest you do something similar if something is not working and you are following a spell exactly as it is written. Just a suggestion.
Also, you may be expecting something out of magick that is unreasonable. Like instantaneous results.
Another part of it may be you are just saying the words rather than feeling them, and using your energies. (Don't know how? Then research some more :) and then try again)