Regarding the freezing issue, do you see an error message on the computer? If so, what does it say?
Do you see this freezing issue when you run the latest release version (version 1.1.4)?
Do you remember what version of iCamSource you were running before (when it wasn't freezing)?
If the Broker Connection Error is intermittent, it indicates that your iPhone has a poor wireless data connection.
If the Source Connection Error appears, but the webcam still works, that indicates that you've recently quit iCamSource and re-launched it quickly. The original iCamSource takes a few seconds to time-out on the server, so there is a little window of time after you quit iCamSource and re-launch it that you might see that error even though the webcam is viewable on the iPhone.