Why is my New Screen not responding?

O.K. Here's the situation, as my first time repairing my iPod Touch 4G, I have already broken the Volume/power copper ribbon cable as it was glued with the metal shield and I did not know that, and including the speakers that were glued to the metal shield, that I also broke, but, I went on to repair my screen.

I replaced new screen and attached the digitizer and screen cable properly and the screen loads to main screen. I try to put pass code in but it doesn't respond to my touch. I doubled check to make sure every connectors were connected properly. I also made sure both camera connectors were plugged in as well.

I just need to know how to get my screen to respond and that way I can order new Volume/Power copper ribbon cable so I can attach it back to Logic board via soldering and reconnect the speakers as well.

Also if your're wondering how did I power on the iPod Touch 4G after breaking my volume/power ribbon cable, I simply turned it on by connecting it with my Laptop and it turns on.

EDIT: This is the picture here where I fixed the broken problem. I repaired t volume/power button, had hard time soldering it, ended up just using electric tape, works just fine, repaired audio blue cable and added a custom one and know for a fact it works as every things was soldered correctly. And I still haven't taken out the new sticker from the inside of LCD screen to show you it's a new screen.

http://img265.imageshack.us/img265/7759/...