I tested your comment form and it is malfunctioning in general. When trying to post a comment I see this error no matter what I enter.
Sorry, You Are Not Permitted To Submit A Website Address In Blog Comments On Your Very First Comment In This Blog. Click Your Back Button, Delete The Website In The Website Field And Submit Your Comment For Approval.
403 HTTP Status Response errors are a standard Internet error code. BPS takes over handling 403 errors so the 403 error could be coming from something else.
Do these BPS general troubleshooting steps in the link below to confirm or eliminate that the 403 error is being caused by BPS.
http://forum.ait-pro.com/forums/topic/read-me-first-free/#bps-free-general-troubleshooting
Additional Notes:
173.245.51.152 is a CloudFlare IP address.
93.182.154.5 is an IP address for a Server in Sweden
Your website’s IP address is a GoDaddy Server in Singapore