John,I guess that You're located in the States so I would suggest to give it another try to download from Hobbes. It's closer than trying to download from OS2 World, since the server is located here in Sweden.
Folowing url will lead you to the latest fixpak for Warp 4, FP15:
http://hobbes.nmsu.edu/cgi-bin/h-browse?sh=1&dir=/pub/os2/system/patches/fixpack/warp_4
It's a huge zip file at 25.22Mb 
If it still won't do, I'll send it up here at OS2 World.Com.
//Kim