Modal within a modal not centered

Hi there,

I'm using several user controls on my webform website.

Some of them open a modal window (using the modal popup extender). Sometimes, it happens that another modal is opened from within an opened modal.

My problem is that, even if the first modal is centered with respect to the full page, the inner modal considers as the origin the upper left corner of the first modal. This makes the inner modal to be shifted to right.

I would like to keep my modal as wide as I want (and not to expand them to 100% of the page witdh), but I am not able to center the inner modal respect to the original page.

Is there a quick fix for this?

Thank you in advance,

MT