iPhone Help me with my 'Better Icon Label Shadows' Theme

[Tmel4198]

I cannot get this to work with iPhone 5,
I tested it on my iPhone 4 and it works great.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>UndockedIconLabelStyle</key>
<string>
color:;
font-size:;
text-shadow: rgba(0,0,0,0.5) 0 1px 1px;
text-align: center;
background: rgba(0,0,0,0.5);
-webkit-border-radius: 6px;
float: left;
padding: 0 3px;
margin: 0 0 1px 0;
</string>
</dict>
</plist>

I am unsure what i have to do to the Info.plist to get it to work on other iPhones...

-Thanks