Image Show problem adding module to header2

HI everyone, I've problem with the Image Show when I add a Custom HTML module (or K2 article) in the header2 position.

The demo looks like this:


Everything works fine in the header1:


But, when I add anything at the header2 position...


Any idea where is the problem?

Thanks

Sorry about the images, I can't find the way to edit the post...

Here are the images:

1st:


2nd:


3rd: