Hi, I have been trying to resolve it by myself but its impossible

My is the following, as you can see in the image, the width of de Dilogo header is one, but the width of the cell is other. I would like to share the same width

localhost screen capture 2012-8-24-13-0-44.png

Like this, with the "..." on the non visible part
aboutfrontend.com screen capture 2012-8-24-13-6-45.png

You know how can I do that?