The URLs of Q2A are perfectly fine and indexable (just Google search some of the sites in the directory).
I did a site search on your site and it came up with URLs like this: http://www.livechatwithdoctor.com/qa/?404;http://www.livechatwithdoctor.com:80/16/post/2012/2/first-post.html
So I think you have a problem there with some redirections or something. But apart from that the main Q2A section is fine, your questions are only a few days old so you need to give Google time to come to the site and index everything. There are millions of pages on the web and Google cannot visit every single page at once.