Just guessing - maybe you specified the license server with a partial domain name ("our-company-server") instead of a full domain name ("our-company-server.our-company.com"), and due to changes in your DNS configuration, DNS now returns some external server out there instead of your local one.
To test this, verify DNS resolution by running "nslookup" or "ping" on the system where you run CoCreate Modeling. For example:
Code:
nslookup our-company-server