Two user profiles on my iMac but only one can connect to the internet

Hi,
I got the most recent upgrade for Lion and installed it.  I have two user profiles on my iMac and now, only one of them can connect to the internet yet both appear to have gotten the full upgrades.  Any ideas why this might be happening?
Thanks!!

Does the Account that can not connect to the Internet have full Administative priveleges or is it a Standard Account. If Standard, check to make sure it is allowed to connect.

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