Well, that's an old version and it was giving this same error for various reasons, so it is no very helpful. You can try checking the logs at C:\Users\username\AppData\Roaming\Spark\logs and maybe you'll find something more useful.
I don't quite understand the last part, what do you mean by datacard and what exactly mean domain in your case. Is it only to indicate you are ourside of your internal LAN or do you put different domain name into Spark. If it was after the change of your IT staff, maybe it would be easier to investigate with them which change is causing this, so it would be easier to understand what is happening.