Word Press High Cpu Usage Problem

my website link
i was suspended by hosting company for high cpu usage
my all pictures are hosted with photobucket
downloading of files is with mediafire and using these plugins
All in one Seo Pro
Easy Adsense
feed burner
infolinks
pingler
seo friendly images
thumbs expert
wp minify
wp super cache
page navi
xml sitemap
Can Any one tell me whats the real problem
Suspension Notice
Dear Customer,

Thank you for contacting Nexus.

Your domain has been suspended due to excessive CPU usage.

CPU usage, is the amount of processing power that your site uses up at any given time. For the most part, your actual usage will depend on how many users are accessing your site, what kind of operations they’re doing and how your scripts are handling those requests. Since you’re sharing your box with a few other sites, taking up too much of the CPU will take away from other sites’ ability to use the same resource.

Your website was suspended due to excessive CPU usage, for complete details regarding our term conditions, please visit the URL given below:
http://nexus.pk/aup.php

The following script/page was using excessive CPU:

/usr/bin/php /home/freesof1/public_html/index.php

Due to the service effecting nature of your scripts, we had to suspend your account for now. Please contact support to have your account unblocked once you are ready to ensure that this issue would be dealt with with in a few hours.

It is required that immediate action be taken to ensure the scripts are fixed for any memory leaks and that their usage is under control and if they continue to cause problems, we may have to shut your account down.

If you have any question, Please don’t hesitate to contact us again.

Regard,