Traffic Estimator Service with Platform Critertion

Hello all! I just began learning about Adwords. Now I happened a problem with Traffic Estimator Service. I want to add Platform Criteria to campaign estimate request, but I don't know how to do. Anybody can help me? Thanks so much!!! -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also fin

TrafficEstimatorService return 0 only

I just started learning about Adwords. I tried running TrafficEstimate sample code but its responses is 0 only. Results for the keyword with text 'cheap cruise' and match type 'PHRASE': Estimated average CPC: 0 Estimated ad position: 0.00 Estimated daily clicks: 0 Estimated daily cost: 0