false positive on my website: displayed as fraud to my customer

[vrootwoot]

Our customers reported that our website as been considered as fraud by avast

They are regularly checked with www.virustotal.com

These sites are
www.opticien24.fr
www.opticien24.be
www.brillen24.be
www.brillen24.nl
www.optica24.es

Would you mind to have a look please? Thanks

[Pondus]

what does avast say?...... a screenshot would help

[Pondus]

seems you need to update Magento.   
http://sitecheck.sucuri.net/results/www.brillen24.be/
http://sitecheck.sucuri.net/results/www.opticien24.fr/

suricata filter give a IDS alert.   http://urlquery.net/report.php?id=3646966

Suricata /w Emerging Threats Pro   
ETPRO WEB_CLIENT Microsoft Internet Explorer remote code execution via option element

if you think avast detection/blocking is wrong, report it here    http://www.avast.com/contact-form.php
you may add a link to this topic in case they reply here

[jefferson sant]

the Url has been Unblocked
in update VPS 130710-1.

[polonus]

Your site may not be malicious at the moment, it has vulnerabilities that could be abused by attackers -> https://asafaweb.com/Scan?Url=http://www.opticien24.fr/
Furthermore as said by Pondus: Magento not updated. We recommend version 1.7.0.2.

polonus