The protocol specified is NOT valid

When I click on Barge link I get an error like :
Internet Explorer cannot open this helper application for sip:68600051@MyIP
The protocol specified in this address is not valid .Make sure the address is correct , and try again.
Any help to resolve it ?
Internet Explorer cannot open this helper application for sip:68600051@MyIP
The protocol specified in this address is not valid .Make sure the address is correct , and try again.
Any help to resolve it ?