Do you have a free or a pro license? The free license only runs 6hrs a day. If it can't contact the Abelcam server, it will only run for 30 minutes.
Maybe a firewall is blocking Abelcam to contact the server?
Free license limitations can be found
here
I know a couple of days ago there where some changes to enforce the license regulations. Maybe that's why before that you could "overuse" your license, but not now anymore.
Maybe you should consider taking a pro license, it's only 20 euro's, and it runs unlimited.