Problem with Gmap and maps generated

hello

I installed this module and try to use it on my page, but have some problem with it. In general it works fine on my page,
but when I can see map and when I click on marker I get white cloud without any text.
But there should some info from body of my page.
You can see it in attachment to this post.

I tried it with both versions for Drupal 6 dev and stable in both the same.