Hey i got problem with this trick http://www.youtube.com/watch?v=bzUbQ2Kxvj0
when i am nearly in brother mount again and i want to that slide my string is warping around the axel and it starts to bind up … whats wrong
Make sure you don’t pinch too long. If you do, you’ll have the tiniest bit of slack and extra string for the yoyo to wrap around. Make sure you let go of the pinch pretty much immediately after you have the yoyo mounted on the string. That’s the best I can give you based on your description. Hope this helps! 
Try keeping the angle of the string steeper for the slide (close to vertical) at 1st if you’re not. That helped me anyway. 
Plus keep the string tension taught for the whole slide up to the brother mount. GL!