[Plugin: Easy Contact Form Lite] Error Message after installation

I tried to install the plugin but got this error message:

/homepages/27/d360664209/htdocs/wp-content/plugins/merlic-easy-contact-form/style/default.css not found

It has disabled the whole website. I have to delete or move the plugin through the FTP client to reactivate the site.

http://wordpress.org/extend/plugins/easy-contact-form-lite/