Odd Wireless Problem!

[Hybrid X]

Hello guys.
I have been having some issues with my wireless connections.
A few months ago it was fine and my Netgear management program showed my signal was 108mbps.
But now it shows a mere 54mbps.
I have upgraded the firmware on both my router and wireless card but it doesn't seem to help.
However, I have found this, which I don't know if it could be the problem.
On my router/wireless card statistic ( I think it's my router ), it shows the WLAN as 11/54M.
Remember that it use to show 108mbps on my Netgear manager program but now it shows 54mbps.
I noticed the problem because my download speeds are slower.
Are you guys able to help me on this? If you can, thanks a bunch!

My router is a Netgear Rangemax WPN824v2
My wireless card for my desktop is a Netgear WG311T
My labtop has it's own built in wireless card.

Now, it's not that my wireless card is incompatible. I use to have the Netgear WGT... version router and I recently bought a new router since I THOUGHT that was the problem but it was not.

Here's a picture.
http://img236.imageshack.us/img236/7391/57217133yg3.png

[classicsoftware]

This would best be resolved by a call to Netgear's tech support....

[TheTree718]

maybe a outside signal is messing with your wifi signal. i.e microwave, cell phone, cordless phone. I heard that the new GH3 xbox 360 guitar wireless controller srews with some freqencies.

[Variable]

Sounds like a dual channel radio, I think the wireless NIC card has to support it. It is basically two radios sending at two different channels. You understand that is only for internal traffic and 54 mbps is a lot of throughput?

[mjc]

I looked up the card and the router yesterday...both are supposed to be dual channel.

So make sure that both are set to use the correct channels...maybe an 'auto' setting as opposed to setting any manually?