[Plugin: Contact Form 7] Blank page on Admin > Contact page

When I click Contact on the left menu it goes to http://www.mydomain.com/wp-admin/admin.php?page=wpcf7

but page is blank. The menu stays on the left. The right column is all white. No text.

I reinstall CF7 and still the same.

http://wordpress.org/extend/plugins/contact-form-7/