keystation pro 88 sound not being generated

Hi,

I am totally new to this forum and the keystation pro 88 and I have a problem in getting it set up.
I have a sony vaio running vista business (service pack 2), I have installed the latest drivers from M-Audio and I have checked that the keystation is available and working within the windows device manager.

I also downloaded and used enigma and when I "send the current bank to the device" I get a message box that says "sysEx Sent" and the keystation flashes "545" then goes to usual screen.

I am not sure if all this is supposed to happen or whether I need to buy/fit any other devices or software.

When the keyboard is used there isn't any sound generated, can anyone help me.

Kind regards

Frank