Posts Not Showing Up Under Categories

i was facing similar problem for my blog http://www.crazybulb.com
when i used to click on category, i used to get a blank page.

I faced this problem after I transferred my blog to a new domain.

I diagnosed the problem to archive.php and archives.php file. both the files were blank. so I downloaded my theme folder fresh from internet. copied the two files into my active theme’s folder and my categories started showing post in http://www.crazybulb.com