Css for Multiple Rows and column combobox in Grid

[Jai]

Hi,

I have one combobox in Grid and i want to show this combobox as Multiple Rows and column and i am using the following css for this combobox

.multipleRowsColumns .rcbItem,
.multipleRowsColumns .rcbHovered
{
    float:left;
    margin:0 1px;
    min-height:13px;
    overflow:hidden;
    padding:2px 19px 2px 6px;
    width:125px;
}

This style sheet is not woking for combobox that is in grid.

Can anyone tell me the css that will apply to the combobox so that i can get the combobox as Multiple row and column in grid ?

Thanks,
--Jai