Intel imac - very slow wireless

Hi guys,
I am having trouble with the speed over my local network. I have the iMac dual booting. When i am in windows xp my speed is just fine (a few mbs a sec). However when i am running osx and i try to transfer files across the network it goes around 400k a sec for example.
It is way too slow. Also when i turn off the wpa then the speed is more like in winxp in osx. But i want some encryption.
I am running a belkin F5D7633au4A.
OS X has all the updates available.
Any ideas would be greatly appreciated.
Thanks
James

I've got the same sorts of problems with my new iMac. I can get it going at about 500kB/sec, in comparison my iBook in the same spot gets about 1.5 MB/sec or so. That's with WPA2 turned on with both.
So, I'm thinking this is working an awful lot like when I'd replaced the memory in my iBook and didn't quite get the airport card's antenna wire plugged in right. Perhaps the worker plugging in the antenna cables didn't get it quite right and the antenna isn't plugged in completely.
It's definitely the iMac, as my iBook works fine with the network setup. It's working okay for surfing, and most of the time with AirTunes it works, though I've heard a few dropouts from the dodgy networking.
It's probably time to pick up the phone and call in a ticket to Apple.

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    Report generated 24. jun 2014. 20.01.32 GMT+2
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      [not loaded] com.devguru.driver.SamsungACMData (1.2.32) Support
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