INSTALL_FAILED_INSUFFICIENT_STORAGE

 INSTALL_FAILED_INSUFFICIENT_STORAGE and one more attribute of <manifest> tag
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.musicbackground"
    android:versionCode="1"
    android:versionName="1.0"
    android:installLocation="preferExternal"
    >