Jailbroken iPod Touch Theme Doesn't Show Theme Lockscreen?

Alright, so I have a new iPod Touch 4G running on 4.3.3 firmware. For every theme I have downloaded from Cydia, (I.E Mac Collision) everything works but the theme's lockscreen wallpaper and slider/unlock method; it just shows the background I had before jailbreaking and the normal slide to unlock. The only things I have checked in Winterboard are the ones for the theme, as well as no Undocked or Docked icon labels. On my 3G iPod I had before it was stolen, the lockscreens worked just fine, and there were no new updates for the themes. Can someone please tell me step by step how to fix this problem, whether it be an SSH thing or something else. Much thanks