Still have problems with FTP downloading?

I use the same ISP as my son, Verizon.net, have the same Modem/Router as he has, use Windows XP with either Internet Explorer or Firefox, as he does. He can download FTP files, I cannot. I couldn't download an HP Printer driver nor an Epson Scanner driver. I don't have any problems downloading Programs and/or... show more I use the same ISP as my son, Verizon.net, have the same Modem/Router as he has, use Windows XP with either Internet Explorer or Firefox, as he does.
He can download FTP files, I cannot.
I couldn't download an HP Printer driver nor an Epson Scanner driver.
I don't have any problems downloading Programs and/or FireFox Add-ons.
Some people mentioned about Port 21. This port is Allowed as Inbound Traffic.
I was also told to temporarily disable the Windows Firewall, then restore it after the download. No luck.
Any comments will be greatly appreciated.
Update: Thank you cyberdoc!
I got to the Advanced tab, but can only find "Use passive FTP (for Firewall and DSL Modem compatibility". Also I don't know how to get to (or where it is) "exemptions>check FTP, etc."
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