Display Column Seperator in Telerik RadGridView

[Sats]

Hello,
I am uing TelerikRadGridView. In that I have added the first column dynamically, and in that column I am displaying Images.
Whenever I am displaying default Image, then I am able to see a vertical line (column seperator) between first and second column
However, when I set Images dynamically, I am not able to see the vertical column seperator between the first and second column, means there is no column seperator line bewteen first and second column.

I think this is related to the column width issue.

I am having in this format

"<HyperlinkButton HorizontalContentAlignment='Left' VerticalContentAlignment='Center' VerticalAlignment='Center' HorizontalAlignment='Left' Height='16' Width='16' BorderThickness='0' 

 

 

TargetName='_blank' ><HyperlinkButton.Background><ImageBrush ImageSource='" + img+ "' /></HyperlinkButton.Background></HyperlinkButton>";

 

I tried to change the height and width from 16 to any other, the image size changes , however there is no vertical column seperator line between first and second column.

Please help me on this