I have NINE (9) ftp accounts that I access. I cannot connect to ANY of the 9 accounts using the laptop, although it DOES have internet connectivity. The host information on each of the 9 accounts is identical in every way to the same accounts that I AM able to access using the same WS FTP Pro version that's on my PC. I have checked and double checked the usernames and passwords; it is highly unlikely that all nine of these accounts are configured incorrectly.

There is some OTHER problem here, obviously.