Unable to run the sample bookinfo application provided in istio

HI,

I have setup kubernetes ( kubeadm ) and installed istio as given up quick start guide.
I tried to run the sample book info application. But the pods are not launched, the deployments are not in ready state.
NAME READY UP-TO-DATE AVAILABLE AGE
details-v1 0/1 0 0 65m
productpage-v1 0/1 0 0 65m
ratings-v1 0/1 0 0 65m
reviews-v1 0/1 0 0 65m
reviews-v2 0/1 0 0 65m
reviews-v3 0/1 0 0 65m

Can you anyone please tell what should be done to make it to ready state ?

Many Thanks.