CSS padding not work in Dataset

Hi,
I defined a padding-bottom inside dataset region. It doesn’t apply it on the screen.
Android client version: R62
CMS: 1.7.9
Android OS: 7
This is the css:
table.DataSetTable {
font-family: Arial;
text-align: right;
direction: rtl;
width: 650px;
font-size: 38px;

}

tr.HeaderRow {

}

tr#row_1 {

}

td#column_1 {

}

td.DataSetColumn {

}

tr.DataSetRow {
padding-bottom: 100px;
}

tr.DataSetRowOdd {

}

tr.DataSetRowEven {

}

th.DataSetColumnHeaderCell {

}

span#1_1 {

}

span.DataSetColumnSpan {

}

What ia the peoblem with my code?