XF 1.4 DFP Header location

[MattH]

Hi Folks,

I saw that DFP has been covered in a few threads for older versions, and tried all those suggestions... I can't get my DFP ad to display, it just shows a blank box.

Same location shows adsense just fine. So the slot is working...
Same DFP ad shows on blog widget just fine. So the ad is working...

I think it is header code location, I have tried:

• Header
• Page_container_js_head
• Page_container (before final </head> tag

Any thoughts on what i'm missing here?

I am running xfrocks widget sidebar, but the ads that show (adsense code) are being displayed using the template in core, so they should be fine...