Need help with wireless connection, constant dropouts

I just purchased a new computer recently, and proceeded in connecting it
to my home network. My wireless router is a Dlink DI-524, and the
wireless dongle is an external Dlink DWL-G122.

On my computer that is connected wirelessly, Internet hardly works at
all. Whenever i try to load a page in a web browser, it manages to get
through "connecting to www.google.com" but stops completely at "waiting
for www.google.com" Also, I ran MSN troubleshooter and it says theres an
error with my "key ports"

About once every 30 mins or so, I can use the net like normal, but
within 5 mins it reverts back to hanging on "www.google.com" Its not a
browser issue, as every application I use does something similar, such
as games hanging on "Logging into server" as opposed to hanging on
"connecting"

Also, all my wireless computer is running XP SP1, and is updated with
the latest wireless drivers and my router is updated with the latest
firmware. And my internet is 256kbps adsl. Modem is a Dlink DSL-302G

I know a stable connection is possible on my home network as i have
another computer on wireless with perfectly functioning internet

Hope you can help, and i apologize for my lack of proper
terminology/spelling.


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