You need to have the driver for the device installed, if it's a regular, brand name board of theirs, the drivers can also be found in Arduino\Drivers\ in the install directory. Aside from that, you also need to make sure the serial port you're trying to program on is set correctly, the Port pulldown menu in the Tools menu in the IDE.
And yes, the beginners or microcontroller subforum is probably the right place for this.