Making columns/rows visible

Hi

I am some small problem with displaying tabulated data, which should roughly appear as it does in an excel table.

On the rest of the site, there are tables, but it is not appropriate to show their borders, etc. For this particular project page though, especially since it has lots columns, they need to be visibly separated, but I am failing to do that.

I have tried to include this code

.ibs table, td, th {
    border: 1px solid green !important;
}

.ibs th {
    background-color: green !important;
    color: white !important;
}

... and included the style class "ibs" in the editors table propeties ... to have such => http://www.w3schools.com/css/tryit.asp?filename=trycss_table_color.

Firebug, shows for the table that the class "ibs" is being applied for this table but no borders are visible at frontend, except in editor, though the green colors are not.

Whether with above solution or not, I just want for this specific table to have the data separated, with columns & rows visible & would appreciate some help.

Thank you in advance.