If you are not getting any calls, make sure that the campaign is started. In the admin, look at the right side of the Projects | Activity page – is the icon green (Started) or red (Stopped)?
Click on the campaign row to select it, then click on “Campaign Readiness Check” (you must be an admin user, not a lead/supervisor, to do this).
Click on the Update button in the lower right of the window to see updated numbers. Look at the 5 indicators at the top. If any of them are red, those are issues that need to be resolved for calls to start.
If everything is green, you have clicked on Update, and calls are still not coming in, try logging out your clicker and at least 2 or 3 phoners and then logging back in. If none of these steps resolve the issue, contact support.