Google Adsense blank block, I can not see ad

I believe many people have the same problem when applying for Google Adsense, very smoothly through the first approved, but in the second review has encountered a problem. Put tags on the site waiting for almost two months, but only blank ad, can not see red auditing alert message in your account, contact the host provider confirmed no blocking Google ads, also confirmed that no conflict of JavaScript, still no ads appear, the experience to others.