"your device is not compatible with this version"

I placed the application in the playback store, and my friend, who works on 4.0.3 on two devices, received the following message when trying to install my application: "your device is not compatible with this version."

One device allows it to be installed, and the other does not. I allow API 3-15, and both devices are 4.0.3. What is the problem?

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.snotyak.basicfuelcalcpro"
    android:versionCode="2"
    android:versionName="1.2.3" >
    <uses-sdk
        android:minSdkVersion="4" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:name=".CalcApp"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/MainTheme" >
        <activity android:name=".CalcActivity" >
        </activity>
        <activity
            android:name=".PrefsActivity"
            android:label="@string/prefs_name" />
        <activity
            android:name=".CalcTabView"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".AboutActivity"></activity>
        <activity android:name=".HistoryActivity" />
        <activity android:name=".AnalysisActivity" />
    </application>
</manifest>