Problem Embedding Skydrive

Post Tabs plugin is great and it has helped me a lot in organising the information in my pages but I have a problem. I try to embed pdf documents that are in Skydrive, using the generated code it provides. The iframes work well outside de tabs but won’t show properly inside the tabs. In Chrome I can only see the upper quarter of the iframe (the rest void), and in Explorer, nothing. Although once in a while, the documentes do show (?). Could you please help me to fix this?

http://wordpress.org/plugins/wordpress-post-tabs/