Validation problem

I have a problem with validation on w3c, I get 2 errors:

1) Line 602, Column 171: Element link is missing required attribute property.

Code on line 602:
<link rel=’stylesheet’ id=’cvg-styles-css’ href=’http://www.mysite.com/wp-content/plugins/cool-video-gallery/css/cvg-styles.css?ver=3.5.1&#8242; type=’text/css’ media=’all’ />

2) Line 603, Column 208: Element link is missing required attribute property.

Code of line 603:
<link rel=’stylesheet’ id=’jquery.fancybox-css’ href=’http://www.mysite.com/wp-content/plugins/cool-video-gallery/third_party_lib/fancybox/jquery.fancybox-1.3.4.css?ver=3.5.1&#8242; type=’text/css’ media=’all’ />

Maybe somebody can help me, please?

Best regards

http://wordpress.org/extend/plugins/cool-video-gallery/