Distributed APK wont install but works with RUN to USB

Created an App with Alloy and TI SDK 3.2.0 GA (All Up to Date). When I Run my App with the target to a Device which I connected via USB it works great. But when I Distribute it for the Android App Store and then copy the APK to the device and try to instal there (to test if the build was ok) it wont get installed (Get install failed Information, no error code or something). But only on some Devices. on my N4 with 4.4.2 it works both way. On my older Samsung Tab N with 4.0.4 it only works when I use the APK gets generated by the "Run" command (or via USB).

My Android Manifest:

<android xmlns:android="http://schemas.android.com/apk/res/android">
        <tool-api-level>11</tool-api-level>
        <manifest>
            <uses-sdk android:minSdkVersion="11" android:targetSdkVersion="17"/>
            <application android:theme="@android:style/Theme.Holo"/>
        </manifest>
        <supports-screens android:anyDensity="true"
            android:largeScreens="true" android:normalScreens="true"
            android:smallScreens="false" android:xlargeScreens="true"/>
    </android>

System: Windows 8.1