downloaded x ei captain .. unable to install

[joemat04]

i downloaded os x ei captain public beta version from appstore , but the os is being downloaded but i 'm unable to install it. unable to click on it.
screenshot is attached.

 

[redheeler]

You can't open it from the App Store. You need to find it in Launchpad or your Applications folder.

 

[naasrd]

I downloaded beta 5 and got a "unable to install...cannot verify" message on the startup.