Virtualmin won't let me create new server

I tried to create a new server, but the system told me that I had tried to use an invalid password. I modified the password and tried again, but this time I am told that ‘Failed to create virtual server : A ProFTPD virtual server with the same IP address already exists’.

This suggests to me that although the initial password was not valid, the system nevertheless went ahead and created a ProFTPD server, but that the whole creation process wouldn’t complete. Now, I can’t create the server for the domain name that I want to !

Urgent help please!

(Also, I suggest that the test for a valid password should precede any server creation processes!