Face Time on Macbook (Snow Leopard)

My Daughter is using a Macbook Mid 2009 running Snow Leopard (Lion not reccommended)

Face time 1.0.2 was running fine until everyone she contacts upgraded to Face Time 2.0 now the Face Time window opens but will not connect.

when she calls out nothing happens!

App store says her software is up to date and will not allow her to up grade to Face Time 2.0.

any ideas ??

Thanks

Ian