Wireless Network File Transfer Speed

[redneon]

I've recently bought a new laptop which I've installed the RC version of Windows 7 on and I've just set up file sharing between my laptop and my Intel iMac which all seems to work fine but I'm a little concerned about the file transfer speed between the two.

My wireless router is G which, as I understand it, should transfer at 54Mb/s which equates to 6.75MB/s. Now, I know that this is an absolute max and I shouldn't expect to hit that mark but at the moment I'm transferring at around 150KB/s which is insane.

I'm trying to copy a 4gb file between the two and it reckons it's going to take around 10 hours.

Does anyone have any idea why this could be?

 

[redneon]

All three devices (laptop, iMac and router) are in the same living room about 6 meters apart. I'm using channel 13. There's only one other wireless network nearby but I'm not sure which channel it's using.