Default [Q]New walkman player

Hi

If i have this http://forum.xda-developers.com/show....php?t=2602727 ROM and i want this https://www.dropbox.com/s/bxedgw97rlycuou/Walkman.apk music player to this what i must do? I uninstall player of old ROM and install new but i have bug on main lockscreen... I can fix it? Or what can i doing? Thanks