Two Units Per Page...OK?

[WSM2006]

I created a new site over the weekend and am using two Adsense units. The problem is that only one of the units is showing? Any thoughts on why this is happening?

[r2d2]

Most likely because Google hasnt rechecked your page to decide what ads to show. They will probably both be filled soon enough. I have had the same 'problem'.

[john190]

It also could be because they have not got enought ad inventury to fill both ad units for your sites niche at the moment.

I have 3 ad unites on a few of my pages and sometimes they all show up and then other times I have only one of them and sometimes even none of them showing up.

So I then either us default ads or just us the collapsing ad banner code.