problem with installing app in the device
<p>I have an android app. (built for 1.5) while installing it on my device it creates no error, but while running it, it says "the application is not installed in your phone"..
can any one help me...?
I have tried this  installing after uninstalling it for many times...</p>

<p><strong>Manifest file:</strong></p>

<pre><code>        &lt;?xml version="1.0" encoding="utf-8"?&gt;
        &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
              package="com.android.testapp"
              android:versionCode="1"
              android:versionName="1.0"&gt;


            &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt;
                &lt;activity android:label="@string/app_name" android:name="WelcomeScreen"&gt;
                    &lt;intent-filter&gt;
                        &lt;action android:name="android.intent.action.MAIN" /&gt;
                        &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
                    &lt;/intent-filter&gt;
                &lt;/activity&gt;


&lt;activity android:name="Untitled1"&gt;&lt;/activity&gt;
     &lt;activity android:name="Welcome"&gt;&lt;/activity&gt;

            &lt;/application&gt;
    &lt;/manifest&gt;
</code></pre>
