"To import a community, you must be a maintainer or owner (not a moderator) of the community on the other site, and an admin of the community (which must already exist) on Dreamwidth. Visit the Import Journal page, and select the community you want to import into in the "Work As" drop-down box. Then, enter the username and password of the maintainer account on the other site, and the username of the community on the other site you want to import from."

So, can you make yourself an owner? Are there any other owners or maintainers on those comms?