getting error "Xcode cannot find the software image to install this version" on deployment?

I am trying to configure iPad for testing and and following steps to make device ready for this. while in the way I am following this error as you can see in the Pic

"Xcode cannot find the software image to install this version"

Actually I attached the device with xCode and it started some installation after that it showed this error.

in ios program developer guide I read this line

Download the iOS Disk Image (.dmg) from the iOS Dev Center for the Apple device you are using.

is it due to this? please help

Looks like the device is already set up for development. You don't need to restore your iPad to continue.

Do you have a valid provisioning profile set up?

I just answered a similar question over here. The particular message "Xcode cannot find the software image to install this version" ...is generally not the issue. A number of other things can prevent the app running from Xcode