Problem With Upgrading

[beno]

When I type
/stand/sysinstall
and go through the screens I get hung up in the ftp process. It keeps 
telling me that it hasn't been able to retrieve any packages, no matter 
what ftp sites I try or how many times I try. I select the site, it asks 
me if I'm multi-user and if the network is configured. I say no because 
it's a stand-alone machine and I'm the only user. It asks me about IPv6. 
I tried yes the first time and it couldn't configure, so I say no now. I 
forget what the next question is, but it has me select my connection. 
Since I don't know, I select that option. Maybe that's the problem? 
Please advise.
TIA,
beno