WordPress Troubleshoot: blank page in wp-admin

I’ve a problem with my site, andikurnia.com that using wordpress engine. After I upgrade to wordpress 3.0.3, there is something weird in administrative page. However, I don’t know what happen but if I tried log in to dashboard there is a blank page opened. I though that cause unstable activate plug ins with newest 3.0.3 engine. What should I do now to log in dashboard and deactivate those plug ins?