MacBook Pro and iMac keep losing wireless internet connection.

Greetings all, two weeks ago I purchashed a MacBook Pro and iMac and they've worked fine, except for the internet. The wireless randomly goes out, but the airport bars remain. At first I thought it was just pages having trouble loading because of the OS (stupid I know) It's been happening more and more frequently and the only way to solve it is to turn the Airport off and then on which allows the internet to reconnect. My wireless router is connected to an HP an the router is a Dlink 1310 wireless G router. Any help would be greatly appreciated.

Hi all,
It seems I am not alone. There is a very strange problem either with my brand new unibody MacBookPro 17" or the Airport Extreme I am using to connect to the Internet via a cable connected router. The router I am using is Billion 7300 and works fine, and I can even connect to the wireless access via the router and all works fine. I am using Airport Extreme to extend the access area in my house and also use a USB drive for storage attached to the AirportExtreme. The funny thing is that the first couple of weeks I had no problems with the MacBookPro going on the Internet via the Airport. At that time I had the wireless part of the Billion modem disabled so as to avoid possible interference. Suddenly, one day about a week or so ago, the MBP would connect first time to the wireless Airport and to the Internet for only about a few seconds and then no update on any of the web pages. I was suspecting first my ADSL, but that was all along OK. The signal strength to the Airport is strong, but just the connection to the Internet is no longer available. Strange thing is I have in the same room a 24" iMac and this is still connected to the Internet via the Airport with no problems. Same settings on both! I tried everything I could think off on the Airport, tweaked, changed, reset and created new connection - but without any luck. It is as if the Airport decided to just block the MBP for whatever reason. I also have the Little Snitch, which I disabled too.
I was hoping that the latest Leopard 10.5.7 would have a fix for such a behaviour, but no change.
I cannot make any conclusion as everything contradicts: if the MBP wireless has a problem, I wouldn't be able to connect to the Billion wireless; if the Airport is at fault I should not be able to connect to it with the iMac. I go to work where other two brands of wireless hot-spots I use (D-Link and Billion 7402) and I have no problems swicthing between the two. It seems only Apple's Airport is a problem for my new MBP.
It must be something in the software of the Airport or MBP ?!?!?
APPLE, PLEASE HELP, THIS IS ANNOYING.
I already spent three days trying to solve a problem that should be 'No Brainer" according to the Apple's design books. But I do have a problem that I did not know about before.
Thank you in advance for any suggestions.
Vlado Damjanovski, Sydney.

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