Using FileZilla I can connect and see the directory on this server, using FTP2 it seems to lock on a NumFilesAndDirs call, the connection was made ok.
The NumFilesAndDirs property access fetches the directory listing, and this is technically a data transfer that uses a data connection just like a file transfer (upload or download). Therefore, if FileZilla works, then it must be that the settings are different. The easiest thing to try is to switch from passive to non-passive by setting the Passive property = 0/false. If that doesn't solve the problem, see this: http://www.cknotes.com/?p=282
PS> The remote directory listing is cached in-memory, so that the next access does not re-fetch the listing. If the current remote directory is changed, then the in-memory cache is cleared so that the next NumFilesAndDirs access fetches the listing for the new current remote directory.