Speed loss with new E2500

I had to change from a WRT300N wireless router which died to a new E2500.  I noticed that the speed my computers report that they are connected to the wireless network connection is now 144.5 mps, versus 270 mps with the WRT300N.  There is no change in location of the devices or computers.  The computers use a WUSB300N adapter.  Any suggestiosn on why this is happening?  Is there a setting or setup that needs to be changed?
Thanks.

The chanel width in the router's wireless tab has to be set to auto 20/40. This means that if the interference is low enough, it will utilize the 40mhz mode to give you a maximum rate of 300mbps. If not, then it will stay at 144mbps.
I don't work for Cisco. I'm just here to help.

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    ~~~~~~~~~~~~~~~~~~~~~~~~~~
    "It’s the questions that drive us.”
    ~~~~~~~~~~~~~~~~~~~~~~~~~~

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