I print with a dreamer all the time, so here's what I would recommend.
1) update the firmware on your Dreamer to the latest - there have definitely been changes, and many of them were very important ones!
2) go to Help --> reset all settings within S3D. This will reset the software to its factory state. Just be sure to save anything you need first
3) after the reset, you will need to restart S3D. When it opens up, you will see the config assistant. Select the Dreamer and everything will be automatically configured.
After doing that, try a print without messing with any other settings. Make sure the stock settings work first before you start making changes.