another way to think of it,... hope it helps
firstoff, remember to spin you're poi as slow as possible when you're practicing.
first practice both hands single beat reverse figure 8's infront of you with each hand seperatly until it's smooth
A: learn to do a 2 beat weave with you're right hand over the left all the time
B: learn it with you're left hand over you're right
another way to look at a weave is basically changing from A to B on each plane continuosly
Imagine a stubburn steering wheel,
first you steer hard right and you're hands go left,
then you steer hard left and you're hands go right,
-have a poi-less drive
-watch a video of the reverse three beat weave and let it play, dont use poi and just sit there trying to move you're hands in the same motion, keep at that for a while and until get a feel for it (maybe even try imagining where each poi is and count the beats after you get the motion right)
ok, lets get down to it
-spin A(right hand over) very slowly and when you're passing by you're right hand side steer hard right and move you're hands to the left
-everytime you get too confused, go back to the video and repeat.
should none of this be working and you're going completally insane with it you can always learn the staff 3 beat weave, it's pretty much thesame so once you get the staff 3 beat down you should be able to do the poi 3 beat aswell.
may the force be with you
PS: after you got that, I reccomend learning the fountain... it's an impressive looking move and shouldnt be too far away once you get to the stage where you've got both 3 beat weaves.