Android Mobile Market : how to set the top left image

I'm sorry if my english is bad, It's not my primar开发者_Python百科y language.

I'm publishing my first app on the Android Market.

On the Web Market, everything is fine (dispite the lack of description, but i'm working on it).

I ve set up the feature image (1024*500). In my mind this image would be on the top left corner of the mobile market. But no, I've uploaded the promotional image, (180*120) but it's always the same : a white box with my app icon in the middle.

How can I change this image ?

Thank you in advance.

It's the 512x512 "High Resolution Application Icon" you can upload with your app. The 180x120 is used in the mobile app on the app details page or in the carousel if your app is featured, and the 1024x500 is shown on the Web market to the right of the high-res icon.