Question regarding AdMob banner ads...

I’m integrating some ad networks into my app and I can’t receive any banner ads from admob. Is this normal?

I got some interstitial ads from admob, but changing the code to banners I can’t see any ads at all. I don’t get any. Do I have to configure something on the admob site? What am I missing here?

Iads are working in both sizes btw.

Anyone else having this strange problem with admob banner ads?

In another thread I found the following code:

ads.show( adType, { x=myglobals.adX, y=myglobals.adY, testMode=true } )  

I read about the “testMode=true” here for the first time. What exactly is this for?

Thx for your help!

Daniela

PS: I wonder which add-network is the best one regarding ad-revenue… what are your experiences?