pioneer x930bt

Hey guys, I'm trying to figure out how I can shuffle through ALL songs when my Ipod is hooked up to this head unit (X930bt). I can only seem to get it to play the songs from the same album over and over. Then I have to manually change to a different album. Ive tried going through the settings but cannot figure it out. I would like the unit to shuffle through ALL of the songs/albums on the Ipod without having to touch the screen unless I want to skip the song. Can anyone help? Thanks in advance!

I should have mentioned, I tried changing the shuffle settings from album to song and back, and it would still just play through songs from only one album until I changed albums, then it would play only that album till I changed it...