It sounds like your system has not detected your wireless NIC. Post the
'dmesg' output as malcolmlewis mentioned as that may help. It may also
help for you to describe your system a bit, particularly the wireless
part. Using SLES 11 SP3 on my laptop I can get online without any extra
work, but I likely have a different wireless NIC, so back to the driver
issue. Often adding those is easy, but it'd help to know what you have
and how the system sees it. Perhaps also post the output to the following

/sbin/lspci -v

Good luck.

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