Difficult to connect to wireless internet

Hello,
I hope someone can help. I've been looking through these boards for days and nothing seems to work.
I am usually not able to connect to wireless internet if my macbook is more than about 10 feet away from my time capsule. However, SOMETIMES I am able to get a strong signal from another room - adding to my frustration.
Here are its current settings:
Firmware 7.4.2 (I've tried all versions from 7.3.2 on - no noticeable difference)
Connected to modem via ethernet.
Radio mode 802.11n (802.11b/g compatible)
Cannot install Airport Extreme Update 2007 002 because my hard drive does not meet volume requirements (???).
Therefore cannot install Airport Extreme 802.11n Enabler.
TC is set to a unique channel according to iStumbler. Minimal interference.
Many thanks for your suggestions.
Paul

Wireless devices in the U.S. must by law, operate on either 2.4 GHz or 5 GHz. The vast majority of wireless networks are running at the 2.4 GHz frequency, which is one of the same frequencies that cordless phones have been assigned.
I can't speak for Apple, but it's fair to say that they and all other manufacturers are limited to what they can do and have no control over that. The airways are already overcrowded and it will get much worse.
Your Time Capsule is capable of creating a wireless network at 5 GHz, so it's worth a try to see if that might solve your interference issues at 2.4 GHZ. There are far fewer networks in this range and cordless phones in general will not conflict with this frequency.
Open AirPort Utility
Click Manual Setup
Click the Wireless tab just below the row of icons
Look for the Radio Mode setting and choose something like 802.11n only at 5 GHz.
Update settings
The downside here is that older devices that operate on "g" speed will not be able to connect. I couldn't tell from your post whether you might have other devices there besides your Time Capsule and MacBook. I'm not sure if the MacBook will connect if it's more than a few years old, but worth a try.
Post back when you have had a chance to experiment.

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... and how are you connected to the Internet? Wireless DSL/Cable modem/router? If so, what is the make/model of this modem/router?
Let's also double-check your MacBook's AirPort settings ...
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o Verify that an AirPort option exists. If it does not, click "New" to create one. (Note: If you are unable to create an AirPort configuration, the AirPort card in your computer either doesn't exist or it is not recognized.)
o Verify that AirPort is "On" (checked)
o Verify that AirPort is at the top of the list. If it isn't, you can drag it to the top.
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o By default, join: Automatic
TCP/IP tab
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o Configure IPv6: Off
Proxies tab
o Configure Proxies: Manually
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o Bypass proxy settings for these Hosts & Domains: <leave blank>
o Use Passive FTP Mode (PASV) (checked)
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Hello j2534a, welcome to Lenovo forums!
Please ask your admin. I had the same problems. The firewall is the main problem me thinks.
But that´s an issue for your admin.
Follow @LenovoForums on Twitter! Try the forum search, before first posting: Forum Search Option
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Difficult to connect to wireless internet

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