Wireless router keeps disconnecting...

Hello there,
I own a Linksys Wireless Router (BERW11S4). I recently updated it's firmware to the latest version (1.52.02) which supports WPA-PSK (TKIP).
I have set the group renewal interval of 7200 seconds, which is the max the software will accept.
My problem is after a certain period, it keeps disconnecting, which i believe is because of the group renewal interval, which can't be turned off. How do I eliminate this problem as it is really annoying to keep re-connecting half-way everytime?
Thanks in advance.

still disconnecting every hour and then...
please help. im so frustrated.
any other settings i should try?
or solution?
help me out 300N users!

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i've been plagued by this problem shortly after i purchased my 15" MBP in early september 2009, but i always thought it was the uni internet provider (keysurf lol) however no one else with a MBP was experiencing this issue. my wireless kept continuously disconnecting but that only happened sparingly so i didnt make much of it...
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FIRSTLY: this is a MBP software issue. i will double check on my windows partition after i post this message.
SECONDLY: only certain MBP's have the problem. in certain cases put up on the forums users complained and contacted apple support enough times to get a new MBP. the one case i read reported that the problem did not plague his new laptop. i HAVE checked the ISP wireless connection on my girlfriends windows laptop (which has survived 3 different drinks being spilled on it, been sprayed with glue, trampled on and dropped numerous times) and the internet works just fine. it connects immediately and does not disconnect like my MBP airport does.
THIRD: apple will NOT comment on the problem or let you know that its their product that is defective. you will NOT be told that its a known issue. you WILL run around in circles until you get a new macbook IF you do. you will ALWAYS be told its a router/ISP problem
FOURTH: some of the listed fixes include the alternate DNS settings the guy above me posted. i personally knew about this through windows experience and manually setting up a MBP Xbox Live connection which requires these parameters to be manually entered which doesn't bode well for a PORTABLE device... (this solution did not work for me)
FIFTH: some people listed that the solution that worked for them was to disabled the airport from remembering the wireless network that they joined. everytime the disconnect occurred, they simply go to the list of wireless connections in the network preferences and remove that network and then add it again.
SIXTH: another proposed solution stated that the issue was regarding the airport frequency type... alt (or as mac users call it-- OPTION) clicking the airport indicator by the battery button brings up some additional airport information including the PHY mode which for me and all the people who reported the issue was 802.11b... this is the frequency that the airport card is using to connect. you will also get your SSID information (which is basically the ID that the airport/computer broadcasts in order to get a connection)
by default most routers/laptop wireless cards use the 802.11b frequency AND most laptops have their SSID broadcast disabled which means that when someone is "looking for a wireless connection", they will not see your computer on the list.
the proposed solution stated that you must find a way to turn your airport settings so that it enables SSID broadcast and switch to a combination of frequencies (802.11b/a/g etc...) when i tried doing this, i went to applications > utilities > AirPort Utility WHICH LEADS ME TO THE NEXT COMMON PROBLEM!
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"AirPort Utility was unable to find any Apple wireless devices. Make sure the Apple wireless device you want to set up is plugged in and in range of your computer then click rescan to try again." <<Rescan button below>>
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"AirPortAtheros.kext" <<<< does NOT contain APPLE at the start. this is NOT a typo
"AirPortAtheros21.kext" <<<< does NOT contain APPLE at the start. this is NOT a typo
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now be careful with this solution. before you take these files out of there TAKE A SCREENSHOT showing you were the files are!!! take a screenshot showing you the files listed in the System Profiler Utility > Software > Extensions... take a screenshot of anything and everything you do to REMIND YOU HOW TO UNDO IT! and for the love of God do NOT delete those files! save them somewhere safe along with the screenshots and back them up in any hard disk AND flash memory sticks (at least more than one!) who knows what will happen after the next update if those files are missing, so at least you will know how to put them back!
and please please please try all the proposed solutions before resorting to taking files out of your system architecture... im NOT going to claim that i know what im doing but this solution worked for me. good luck and report back any success or failures you get. im going to check this post later today and at least for the rest of the week while im checking that my airport is indeed working correctly. (note i tested my airport. after putting it to sleep several times and/or turning the airport on and off several times it has been working without glitches (it was slow ONCE! but it sped up when i pushed command+R = refresh on my safari and firefox browsers)
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ps: sorry for the long read... :/

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Coles Cross,
Thought you may have been boosting a WiFi signal with the router. With you plugging into the router yours would be closer to the router so you wouldn't be having the problems I'm having. What I can't understand is that I'm on one of he first Intel iMacs and the web browsing is fine. The new MacBook, sometimes it works and sometimes it doesn't. I can run network diagnostics and it says I have the connection but, the browser just sits there or takes forever to load. I usually just give up on it. I go back to my iMac and all works fine. If you or anyone would know what the difference could be, I'd appreciate it.
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ACL found but not expected on "Library/Application Support/Apple/iChat Icons/Fruit".
ACL found but not expected on "Library/Application Support/Apple/iChat Icons/Fung Shui".
ACL found but not expected on "Library/Application Support/Apple/iChat Icons/Funk Animals".
ACL found but not expected on "Library/Application Support/Apple/iChat Icons/Gems".
ACL found but not expected on "Library/Application Support/Apple/iChat Icons/Hollowbody Guitars".
ACL found but not expected on "Library/Application Support/Apple/iChat Icons/Planets".
ACL found but not expected on "Library/Application Support/Apple/iChat Icons/Tribal Masks".
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This repeats over and over, quite frequently. Any good jabberd gurus know where I should look? I checked out the router.xml but nothing stood out as obvious.

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/Library/Server/Messages/Config/jabberd/router.xml
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and others in that folder all matched, but they mismatched with info in these plists…
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/usr/libexec/PlistBuddy -c "Print password" /Library/Server/Messages/Config/Rooms.plist
set those with eg
/usr/libexec/PlistBuddy -c 'Set secret HASHED_SECRET' /Library/Preferences/com.apple.Proxy65.plist
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After that and an off/on of messages, the syslog improved and after a reboot went totally stable (wrt jabber anyway!)

Wireless router keeps disconnecting...

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