control keys of latest apple wireless keyboard don't work on iPhone 4

Hello;

I just brought the latest apple wireless keyboard(2011) and I tried the control keys(briteness, music control, volume control) none of them worked on my iPhone 4(ios 4.3.5), but those shortcuts like: cmd+a, cmd+c...worked very well, I don't know what's wrong with this and I think those control keys are very useful, I'm planning to replace my old Lenovo laptop with my new accessory, who can give me a hand please!!! Thank you!