You should probably contact your hosting provider if you want this resolved. They can change or disable the mod_security rule for your web application.
The rule in question is part of the 'basic' rule set created by Atomicorp and distributed by Plesk (
http://www.plesk.com). Your hosting provider is using the Plesk control panel to manage their web server security settings and choose to use the free Atomicorp basic rule set. I highly doubt that Atomicorp will adjust their rules based on this report.