在从iTunes传输到iPhone后，临时发行应用程序是灰色的

I've been develoming an app and is at a stage now where i want to make other ppl able to tst out my app. I've created a Ad Hoc provisioning profile and build an .ipa file with archives. After that i added the .ipa file to iTunes apps library and sync'ed iTunes with my iPhone. After this i look at my phone and the app is grayed out and if i press it it writes installing, but never gets done installing.I've been develoming an app and is at a stage n