Iphoto won't import my m4a movies from my olympus camera

I have a macbook pro with leopard 10.5.8 and iphoto 8.1.2 and never had a problem to upload movies from my camera's or iphone to iphoto.

But now i have an olympus camera and the movies are in m4a format. I know there are movies on the sd card but iphoto nor my macbook would recognize it.

i am only able to watch the movies on my camera. i would really like to import those movies to my iphoto library any suggestions?

Do i need to upgrade my iphoto version/ilife???

I am thankful for all help!!!

Steffi