about: commandlink in listgrid column

I have a following Listgrid in my page.

<bjsf:listGrid value="#{searchpage.list}" var="to" id="listGridID"      binding="#{searchpage.listgrid}"
                                                  rows="5" height="75%" rowClasses="rowClass1, rowClass2" editable="true"
                                                  updateListener="#{searchpage.update}" >

</bjsf:listGrid>                                                                
                         
<bjsf:pager for="listGridID" width="260px" showButtons="true" showLinks="true"  numberOfLinks="5" />

Here columns get added dynamicaly. I have given one of column data to be displayed as commandlink. But i'm unable to click on the link. Instead whole row gets selected.

Can you suggest what can be the problem.
Priyanka