Not recording new data after database import

I am in the process of moving to a new domain. I exported the old SQL database, and then imported the database to the new server using shell. I uploaded a fresh install of Piwik and went through the install process. I also updated the tracking code on the websites. When I log into Piwik on the new domain, I can view the old stats from the old database, but it’s not recording any new visitors, but my old Piwik install is. I have the tracking code from the old and new servers on my websites, so I should be seeing the same stats on both Piwik installs. Am I missing a step? Any advice?

Use only one tracking code and it should work