Two of the sites connect
but they are not Aminet Sites, One says incorrent logon.
All of the sites listed are Aminet sites. If you can't see the aminet directory tree directly after logging in, go the the "aminet" or "pub/aminet/" directory. They all accept anonymous FTP users (I just verified that), not sure why you'd get an error message when logging in.
se.aminet.net does indeed time out, I'll notify the mirror admin.
May I ask why you insist on using FTP? Please refrain from mass downloads.