i have an hk 525 and i cant seem to get it to let me change the x-over points for each speaker....i go into the set up menu on screen and it only lets me change the lfe x-over point. anyone with this unit or that has any ideas it would be greatly appreciated. i have read throught the manual and cant seem to get it to work again... i set them once before i had any sub hooked up cause i wanted my towers to put out a little bit more bass.. HELP!!!