First of all, your site is not a PTC. You don't pay anyone for clicking on your ads. You are getting some wrong advises here.
Your site is having the what exactly Google mentions it to be i.e. 'Very low content'
How many total pages you have on your site. I think it's very low.
Add content for few days and submit again.
If you still get rejected, add me on FB:
http://www.facebook.com/aniket.kaushal
Your site is well-established n pr1, so I won't recommend you to shift to a top-level domain as that will be like starting from scratch.