can't connect to certain server


I'm not able to connect to one server, so as to FTP to that server. I am able to connect to other servers, it is just that one.

I have tried to connect from another computer at another location and it connects fine, so it looks like it is my home computer, not the server or SmartFTP.

I assume it has something to do with my fire wall but I don't see anything and I am able to connect to the other servers I need to connect with.

Any ideas of what I should look at.

Thanks for your help,