generate developer certificate for ipad

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iOS

iPad

Xcode

Hi All,

I have an iPhone application , which is working fine on iPhone device.

recently i got an iPad , but I am not able to execute application on iPAD!!!

--> I have registered the device to apple development center
--> I am not able to add the provisioning certificate for the iPad and previously certificates are not valid.

The last time I generated the certificate for iPhone with the help of Launch assistance on apple developer site, But now the apple site is updated and with the new options I am not able to generate required certificates to execute the app on iPad.

I am getting error "Valid signing identity not found"

I am trying to create new development certificate but the option is disabled, how to create development certificate for iPad?

Please suggest how to make it work ASAP.....
Your help is appreciated...

Thanks,
Avinash