christeljacques 0 Newbie Poster

Hi there,
I bought a Lacie External HD (160GB, Porsche, firewire), formatted it for Mac, transfered all my music and movies on it and after 1 week my eMac (OS 10.3.8) stopped recognising it. It doesn't mount and the light on the Lacie HD keeps flashing green and amber. What does this mean??? what can i do?
christel