Mouse Back Buttons Work In Firefox, Not In Dolphin

My mouse back buttons (the ones on the side) work fine in Firefox but I can't figure out how to get them to work in Dolphin. I 'd like to be able to go back and forward when I view folders in Dolphin. What I don't understand is that both of these programs use the same shortcuts, Alt + left arrow and Alt + right arrow, but it only works in Firefox.

I tried adding "Buttonmapping" to my xorg.conf file, but I really don't understand how this works.

Could anyone give me some ideas on what I need to do to get these buttons to work in Dolphin?

Thanks

I'm running version 11 beta 3 with KDE4

Can someone confirm whether or not the back and forward buttons on their mouse work in Dolphin?

I can tell you my back button works fine in dolphin kde4. But then I'm not running 11 beta3.

see my sig

I can tell you my back button works fine in dolphin kde4. But then I'm not running 11 beta3.

see my sig
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thanks caf4926. Now all I have to do is figure out why mine don't work