Freight Tycoon sound problems

[mp3king82]

I have been playing the game for awhile with no problems using on board video. Today I bought a new nvidia card and after putting it in and installing the drivers I now have no sound. In the game options the sound volume is greyed out but sound works in all other games. I have tried reinstalling directx but nothing work. Does anyone have any idea how I can fix this?

Thanks
Roger

Just as a note I also tried using a pci sound card and that didn't work ether