Right-click on Computer icon, select Manage and go to Device Manager. Double-click the Ports tab, select the Communication Port and press the Port Settings. Change the Bits per second value to 128000, Data Bits to 8, Stop Bits to 1, select Parity - None and Flow Control - Hardware. This should increase the speed, but you need to know that the speed is strongly influenced by the zone you're in, because you're using a wireless-enabled device.
