InMobi Ads Size Problem 300x250

I hope there is InMobi expert here

i am testing on an InMobi Ad 300x250
But when i try click the Ad, the AD is too large to be display

Do i need to setup anything?

here my code

[code]
local ads = require “ads”
ads.init( “inmobi”, ‘my_app_id’ )
ads.show( “banner300x250”, { x=0, y=100, interval=5, testMode=true } )

[/code] [import]uid: 10373 topic_id: 20214 reply_id: 320214[/import]