Network admin dashboard doesn't work after migration

I migrated my multsite install (only two sites on it so far) to a new server and the sites load and I can login to the primary site's dashboard, but I can't login to the site admin dashboard. It gives me a redirect loop error. I think it's because I have Domain Mapping network activated with the old domain name.

I suspect if I can disable the domain mapping plugin manually (from the DB or by removing the files) I will be able to login. Does that make sense? What's the best way to fix this problem?