iPod charging when connected to wall outlet but not charging and connected when plugged to Computer. Help?

So I have my charger here that I bought and it was working fine, really fine. The last time that I plugged the cable to the computer was last week. I only do that when I want to add music. Now I wanted to add music and videos again. Now the problem is, whenever I connect it to the computer, it DOESNT. I don't see the LIGHTING symbol near the battery symbol. I don't see a notification from my iTouch whether to TRUST the computer or not, and I don't see the iTunes popping out and syncing my iTouch automatically.

I tried charging it again using the wall outlet but it was perfectly fine. I also did a lot of tutorials and stuff but none worked. I checked the cable, I tried on other USB ports, I did troubleshoot and nothing appeared, iTunes is updated, been restarting my iPod and Computer a dozen times now. I'm getting sick of this. PLEase help me.