Well, the problem with my evocations is that i don't really give the spirit to appear, how should i put it?
After saying the Vinculum (Conjuration), you should atleast wait abit like 10-15-20 minutes to give the spirit a chance to arrive, not 1 minute then ''okay lets go to the curse thingy or lets start to burn his sigil''. After every conjuration, wait abit, feel vibe of the place, has it changed? Like Adley said, go around the circle at that time maybe 6-9-12 times, that might help

, just spitting this out
First time i evoked Bune, it didn't go 2 minutes i went to Barlanensis conjuration and the curses, which was wrong(still got results) but respect goes a long way. I should have waited and give him a chance to arrive if that makes sense
When i play Ouija with my sister, that spirit doesn't answer INSTANTLY, it takes awhile like 5-10-15-20 minutes for the spirit to come through, that is what i have experienced

It is Bunes lesser spirit who is coming, but it takes abit time for that spirit.