Control Table-merge cells with input field

Hi,

I want to use the control Table merge cells like here:

SAPUI5 Explored

Actually it works fine as long as I merge text cells.

<ColumnListItem>                  <Text text="{ScaleType}" />                  <Text text="{Rate}" />                  <ObjectNumber number="{ScaleQuantity}" unit="{Uom}" />                  <ObjectNumber number="{ScaleRate}" unit="{Currency}" /></ColumnListItem>

My goal is to merge now a input field but it doesn't work...

<ColumnListItem>                  <Text text="{ScaleType}" />                  <Input value="{Rate}" />                  <ObjectNumber number="{ScaleQuantity}" unit="{Uom}" />                  <ObjectNumber number="{ScaleRate}" unit="{Currency}" />                </ColumnListItem>

Any idea why?

Thanks in advance

Matt