AdMob - Cannot get any Test or Real Ads to display :(

Hi there, perhaps someone could help me?

Having a minor nightmare with AdMob. Adverts won't appear at all. Here's what I've done:

Made my AdMob account.
Created an App within the AdMob site.
Created a Banner Ad Unit.
Copied the ID to Fusion 2.5 Developer (most recent build) and pasted within the Banner Id section of the AdMob object Properties.
Placed an *asterisk* under the Devices List of the AdMob object Properties to allow test ads.

Within the Event Editor:

Run This Event Once:
Set AdMob Test Device to GetDeviceIDAdMob
Set AdMob Size to 0
Set AdMob Position to 0
Set AdMob Zorder to 0
Show Ad Banner

End of Frame:
Destroy Ad Banner

I've set the permissions of the game (not sure if its necessary but I've done so anyway) to:
ACCESS_NETWORK_STATE
INTERNET

Absolutely nothing happens when I build the app in Release mode and test on my device. Can anyone shed light as to why this may be happening?

I didn't think to do that - I've just tried a sample ad from the link you provided, it works fine there.

Thanks - I'm not sure what though. One thing I am wondering though - my AdMob account was only approved earlier today... I wonder if it takes time for ads to appear?

EDIT: I think that's whats happened - it works fine now! I had to wait for a while after the account was approved