my Email icon and Music icon wont change

hello. im new jailbreak , have newb problem. (apologies in advanced). downloaded "alt icons" cydia , once spring icons change except mail , music. went through files see if alt icons supported mail , music, , does. has png icon both of them, wont change after spring it. helpers? thank in advanced time.

 

yes, mail icon name has changed icon@2x.png (watch capitalization) , located in com.apple.mobilemail

music icon name has changed well, icon@2x.png , located in com.apple.mobileipod

 

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