tv card driver lead teak

hello
i am iranian
i have windows 7 and tv card ledteak expert 2000 and driver installed but i have not sound .
thank you if solve problem .

Try right clicking computer in task bar then click manage/ device manager sound devices and see if you have any yellow asterx by any conponents if so try ckicking it and update driver. You can also go to the leadtek manufacutrers site and see if they have any updated drivers.