Why is the texture pack not showing up in the minecraft menu?

A while back I downloaded a texturepack and the mcpatcher. It worked really well. No problem… Well now I downloaded a different texturepack, did everything I did with the first one and it won't show up in the menu where you go to change it. Yes, everything is right… It's zip and everything… It's exactly how the first one is… The difference is, it's just not showing up… Making the zip into a file doesn't help either… I have 1.7.4 version… It's exactly like the first one. I don't know why it's doing this

Added (1). @East yes, Like I said. I did exactly how I did the first one. It works and this one doesn't… Is it possible that it just could be the texture pack?

Did you make sure you put in the texture pack folder in your minecraft folder? Sometimes I forget to put stuff in the right folder or I misplace it.