1. your website URL
2. exact error message
3. Are you guest or logged in member when experiencing this problem?
4. May be take a screenshot and let us see what you see.
IF, your workplace administrator is blocking http traffic to blastchat.com we can not help you, it will not work from your workplace computer. Try it on a computer that is not in your workplace network.
If I understand it correctly "in work it blocked" means that at your work place a firewall blocks connection to blastchat.com? If that is the case, we can not help you to connect to chat from your work computer.