c# - Telerik Grid disturbed with action column -

note: when added action column edit delete image telerik grid, whole grid disturbed shown in screenshot.

this occurs when want add action column.

any highly apprecieted.

thank you

<telerik:radgrid id="radgrid1" runat="server" pagesize="20" width="100%"             autogeneratecolumns="false">              <mastertableview name="masterview1" datakeynames="regid" allowmulticolumnsorting="false">                      <itemstyle cssclass="gridrow1" />                             <alternatingitemstyle cssclass="gridrow2" />       <columns>       <telerik:gridtemplatecolumn headertext="action" datafield="regid" uniquename="ckboxdelkey" headerstyle-cssclass="leftgridheader">        <itemtemplate>                               <nobr>                                              <asp:imagebutton id="btnnoteedit" tooltip="edit goal" imageurl="images/emailalertedit.png"                                                   commandargument='<%# databinder.eval(container.dataitem, "regid") %>' commandname="updatekeyresult"                                                 runat="server" />                                             <itemstyle width="90px" />                                              &nbsp;                                             <asp:imagebutton id="btndel" tooltip="delete goal" imageurl="images/emailalertdelete.png"                                                 commandargument='<%# databinder.eval(container.dataitem, "regid") %>' commandname="delnote" onclientclick="javascript:return confirm('are sure want delete?');"                                                  runat="server" />                                              <itemstyle width="90px" />                                             &nbsp;                                         </nobr>                                        </itemtemplate>                                 </telerik:gridtemplatecolumn>                                  <telerik:gridboundcolumn datafield="lastname" headertext="lastname" headerstyle-cssclass="gridheader"                                     sortascimageurl="images/emailalertsgridasc.png" sortdescimageurl="images/emailalertgriddesc.png"                                     sortexpression="lastname" uniquename="lastname">                                     <itemstyle width="90px" />                                 </telerik:gridboundcolumn>                                  <telerik:gridboundcolumn datafield="firstname" headertext="firstname" headerstyle-cssclass="gridheader"                                     sortascimageurl="images/emailalertsgridasc.png" sortdescimageurl="images/emailalertgriddesc.png"                                     sortexpression="firstname" uniquename="firstname">                                     <itemstyle width="90px" />                                 </telerik:gridboundcolumn>                                 <%-- <telerik:gridboundcolumn datafield="keyresult" headertext="key result score" headerstyle-cssclass="gridheader"                                     sortascimageurl="images/emailalertsgridasc.png" sortdescimageurl="images/emailalertgriddesc.png"                                     sortexpression="keyresult" uniquename="keyresult">                                     <itemstyle width="80px" />                                 </telerik:gridboundcolumn>--%>                                 </columns>                             </mastertableview>          </telerik:radgrid> 

what expect do? @ it's heart, radgrid table element rows , columns. if add 1 more cell 1 of rows, not right. suggest making gridtemplatecolumn every row , deciding whether show buttons or not within cell.