With an upload speed of 681kbps, you have have issues broadcasting at anything above mobile quality, and even that may not stream reliably. Have you tried using Procaster's mobile setting at all?
Additionally, you may want to try restarting your channel:
-Go to your Account Center
-Click the 'More' button at the far right of your channel
-From the options that roll out below your channel, click 'Restart'