Unable to install 'appName' Error

Hi,

I'm using enterprise distribution certificate and when trying to install the app(via itunes, weblink) always getting "Unable to install <<appName>>" error message.

It's Not even running on ios device in development mode , getting below error when running on device

Error when install package on device: code -402653081

Also i have i phone distribution certificate and development certificates in keychain access but wihout private key.

I have generated these certificates many times using CSR but can't see private key in keychain access. this can be an issue?

Waisted 2 days solving this. Pls help.

Thanks