Unable to see any subscriber lists

I am a complete newb to phpList. I am trying to help an organization in Vietnam send out a newsletter as their former administrator has left. The problem is, after logging in, I cannot see any subscriber lists. I then attempted to add myself as a subscriber and still did not see the new entry.

When send a test mail, the mails are sent to the three addresses entered

@Vietyank You didn’t say which release of phplist you are using.
Possibly you need to be set up as a super-admin.