Guys, hello! You are my last hope lol

Sorry for my english, its far from perfect, but anyway:

I have just installed my SPH-DA01 and bought a second hand ipod touch 4 with 6.1.2 IOS. 

The software version in SPH-DA01 is 2.50 and the software version of Appradio in my phone is 2.7.3. When i connect my ipod, it shows me some warning texts on the screen and finally i have this: Nothing else happens. Only this main appradio screen on my ipod and the black screen with some buttons on the left in my Pioneer

Could anyone please tell me how it can be fixed? Will upgrading the software from 2.50 be enough? 

And one more question: can i listen to music via different programs? I have a VK app in my ipod (VK is a sort of Facebook for russian people) and there is a lot of music there, so mostly i listen to music via this app. will it work in the car? or i can only listen to music via default "music" app in ipod? 

Thank you guys in advance!

What's the text on the radio, it's difficult to make out, have you tried anyone else's iPod/iPhone?

What's the text on the radio, it's difficult to make out, have you tried anyone else's iPod/iPhone?

there is no text on the radio, it's just some buttons (pause, sound etc). i tried multiple devices and the problem is similar with each of them

I'd update the radio firmware to the latest one for starters