Having theme issues

[lchsoanthers09]

For some reason most lockscrean themes or sliders or any theme won't work been trying to get the htc clock to work can't so does anyone have a idea what could be causing this

 

[farbod21]

Make sure the theme is compatible with your firmware. A lot of file names change between firmware...

 

[lchsoanthers09]

Ohhvthat makes sense stupid question though how do I make sure it's compatible

 

[farbod21]

Ohhvthat makes sense stupid question though how do I make sure it's compatible

Usually by checking the info on cydia. Also release date is a big key. If its an older theme, it was probably designed for iOS 3.x.