RdlP on "Chrome and Firefox detect malware on my site"

Hello,

I have a very strange problem. Month ago I had installed a wordpress blog but I don't use it, a week ago I enter on my wordpress site and it says that there was a new version available (3.9.1) so I update my site but now chorme, firefox and SecuriSite check detect my site as malware.

I remove the files from my server and remove wordpress database and re-install it and the problem ocurr again.

I have re-installed many times and it doesn't work, firefox, chrome and SecuriSite detect malware on my site.

SecuriSite says me:

"*Known javascript malware. Details: http://sucuri.net/malware/malware-entry-mwfree4025
<script src="wordpress/wp-content/themes/twentyfourteen/js/html5.js"></script>"

Any ideas?

Thanks