WD MY BOOK Studio Edition Wont Mount on Lion

Been using a WD My Book Studio Edition , for my Mac Book Pro Laptop

Updated from Snow  Leopard to Lion approx 30 days ago  , my WD My Book Studio Edition , will not mount on Lion 

Talked to Tech Support they recommended , downloading updated drivers , but that failed to solve the problem

Any ideas or tips would be greatly appreciated ,

John Piercy

Did you tried to also download the latest firmware version? 

Yes I did , the Tech Support guy , directed me to download the My Book Studio Edition

Wd Macintosh and Turbo drivers ,

That didnt help ,

John Piercy