Tried multiple times but still it says "Unable to render Card preview"

[CastingGallery]

Have added various meta tags that is suggest and also made sure each of them are closing properly.

Added proper image tag that displays image when seen in different tab.
Not able to figure out the exact error that will help render the twitter card properly.

URL
http://castinggallery.in/member/133/pankajupadhyay - Requires login but should be accessible by “Twitterbot”

Meta as below

<!-- Twitter Card data -->
<meta name="twitter:card" value="Check Pankaj Upadhyay's profile to check latest updates from  his  profile." />
<meta name="twitter:title" content="Pankaj Upadhyay - Member - Casting Gallery" />
<meta name="twitter:description" content="Check Pankaj Upadhyay's profile to check latest updates from  his  profile." />
<meta name="twitter:creator" content="@CastingGallery" />
<meta name="twitter:domain" content="CastingGallery.in" />
<meta name="twitter:image" content="http://castinggallery.in/upload/133/IMG_20150510_121511.jpg" />

Your help is appreciated

Thanks in advance

[andypiper]

The Validator returns this:

INFO: twitter:card = Check Pankaj Upadhyay's profile to check latest updates from his profile. tag found

This is not a valid value for twitter:card.

[CastingGallery]

Wow, that worked… it was silly mistake, we thought it would be page summary.

Thanks for your response.
Have a great day.

[andypiper]