General :: Android Custom Permission - No Longer Open Own Application?

I created a test android app that does two simple things, open the browswer and open the calculator

My main problem is that once I put a custom permission inside the mainfest, I can no longer open my own application. The app does appear on the launcher screen but when I launch it, it will say "App isn't installed". However using a second app and giving it the proper uses and making sure it's signed by the same signature it opens fine.Here is the manifest for my main app:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dms_test_app2"[code].....