I'm new in Android, I was trying to set `installLocation` in manifest, I found [here](https://stackoverflow.com/questions/7582311/asking-about-androidinstalllocation-on-manifest) that my minsdk should be Ver2.2(froyo) and above.
here in my mainfest:

```
<?xml version="1.0" encoding="utf-8"?> 

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ir.royalplus.guessyourcar"
android:versionCode="1"
android:installLocation="auto"
android:versionName="3.0" >

<uses-sdk android:minSdkVersion="7" android:targetSdkVersion="17" />

```

but I still have this error:

```
error: No resource identifier found for attribute 'installLocation' in package 'android'

```

what is wrong with my code?!