Maybe your website out from Google SERP because you have duplicate contents on your website. Google will banned the blog that have duplicate content. Trust me.
nice how people are quick to come here to ask for help, but dont bother returning to give more information to share with everyone else. Thats one person i will not be helping in the future.
I had a good website with a very good keyword on second position in Google,I got back links using a directory and asking for back links in exchange for a link in directory,then one day the second position was gone,I got penalized for having this directory,so be very careful how you build your back links.