Incompatibility MacPro Quad-Core 2010 and AirPort Extreme for DHCP

Hello,
I have a MacPro 2.8 Ghz Quad-Core Intel Xenon 2010 EFI 1.5, for my internet, I use an AirPort Extreme Base Station version 7.4.2.
When I try to access the internet settings of the AirPort Extreme in the DHCP, the first DHCP address does not select anything in the dropdown menu.
Here is a picture screen:
http://img210.imageshack.us/img210/4995/airportdhcp.jpg
I tried with a second MacPro Quad-core 2.8 Ghz and the error persists. By cons, with a MacBook Pro 3,1 or IMac 4.1, normally I go to the menu in question.
For it is impossible to modify the airport extreme settings with an error message that afirm the first IP address is invalid.
Unable to select because the menu is empty.
I really think a bug MacPro?
Someone does have this problem?
Thank you for your help.
Roberto
Not speaking much English text translated automatically by Google.

roberto1971 wrote:
When I try to access the internet settings of the AirPort Extreme in the DHCP, the first DHCP address does not select anything in the dropdown menu.
It is possible that the new version of AirPort Utility may help:
http://support.apple.com/kb/DL955
"Resolves an issue that caused the DHCP settings tab to display incorrectly"

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Message was edited by: Jerimy75

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Hello -
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Attached the screenshots of both Time Capsule and AirPort Extreme configurations.
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AirPort Exteme:
Time Capsule:

Hello JuliaApple. Welcome to the Apple Discussions!
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Message was edited by: macjack

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Incompatibility MacPro Quad-Core 2010 and AirPort Extreme for DHCP

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