My CSS doesn't load in IE and Firefox. In Chrome it works without any problem.
What should I do? I have the following code:

.kolor1 .x-grid-cell
{


background-color: #9EE36D !important;

}

.kolor2 .x-grid-cell
{
background-color: #D8E26C;
color: #900;
}

.kolor3 .x-grid-cell
{
background-color: #C3E6F7;
color: #900;
}
...