Website Getting Frozen

Hello

I have a problem with my web site wwwm.martialartslab.com it’s getting frozen (I can’t open in for 5-10 min) every time when I’m posting or editing articles with wordpress. Most likely this problem appeared then I add some plugins, I just can’t find out which one cause this problem.
Can you tell me how can I solve this problem please?

This is my site performance:

WordPress Plugin Profile Report
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Report date: January 1, 2013
Theme name: Genesis
Pages browsed: 5
Avg. load time: 2.1663 sec
Number of plugins: 25
Plugin impact: 75.53% of load time
Avg. plugin time: 1.6363 sec
Avg. core time: 0.2925 sec
Avg. theme time: 0.2069 sec
Avg. mem usage: 35.35 MB
Avg. ticks: 10,057
Avg. db queries : 73.60
Margin of error : 0.0307 sec

Plugin list:
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P3 (Plugin Performance Profiler) – 0.0211 sec – 1.29%
AdSense Now! – 0.0065 sec – 0.40%
Akismet – 0.0167 sec – 1.02%
All in one Favicon – 0.0129 sec – 0.79%
All in One Webmaster – 0.0057 sec – 0.35%
Author Advertising Plugin – 0.0063 sec – 0.39%
Contact Form 7 – 0.0792 sec – 4.84%
Digg Digg – 0.0553 sec – 3.38%
GD Star Rating – 0.1544 sec – 9.44%
Genesis Simple Hooks – 0.0120 sec – 0.73%
Genesis Social Profiles Menu – 0.0064 sec – 0.39%
Google Analytics For WordPress – 0.0237 sec – 1.45%
Google Analytics – 0.0044 sec – 0.27%
Private Messages For WordPress – 0.0340 sec – 2.08%
Seo Automatic Links – 0.0080 sec – 0.49%
SEOPressor V4 – 0.6773 sec – 41.40%
StatPress – 0.0218 sec – 1.33%
Subscribe2 – 0.2198 sec – 13.43%
Video Sidebar Widgets – 0.0126 sec – 0.77%
Wordpress Seo – 0.0418 sec – 2.55%
WP Admin Microblog – 0.0198 sec – 1.21%
WP Help – 0.0200 sec – 1.22%
Wp-Insert – 0.1328 sec – 8.12%
Wp Super Cache – 0.0203 sec – 1.24%
Post-Plugin Library – 0.0233 sec – 1.42%