Which program were you running on your PS2 as you attempted to ping it?
Originally Posted by BoboBlockSheep
If it is a program that does not control the Network Adaptor (Or does use the NA, but just did not initialize the network adaptor), pinging the console will not work.
uLaunchELF does not load the NA drivers unless you access a part of uLaunchELF that uses the NA.
Does the router reflect that the console is physically connected to it (E.g. the LINK light for the port that the console is connected to lights up)?
The network adaptor setup disc is not useful for homebrew software. It is only used for Sony-licensed software.
If you want to configure the NA for use with homebrew software, use a program like uLaunchELF or OPL to do that, or edit IPCONFIG.dat on your own if you know how to.
Unmodified SCPH-77006 with SM 3.6
SCPH-39006 with M-chip modchip, SCPH-10281 NA and refurb Seagate 80GB HDD
SCPH-10000 v1.00 with SCPH-10190 PCMCIA NA and SCPH-20400 HDD unit