when i move clicked mouse on any row it selects the row,

i want to select only those row(s) on which i clicked mouse,

Actually i implemented drag drop within grid thats why it should not happen in such a way because when i drag any item it selects all rows on which i moved the mouse

following is my code

<ig:WebDataGrid ID="gridproductsource" DataKeyFields="catalogue_category_product_code"  

runat="server" AutoGenerateColumns="false" StyleSetName="Office2007Silver" EnableDataViewState="true"  

EnableAjax="false" Width="1071px" Visible="false" ItemCssClass="GridRow">

<EmptyRowsTemplate>

<div id='proddest0' class="dvdroppable" style="width: 100%; height: 100%;">

                                                                    No Data Found

</div>

</EmptyRowsTemplate>

<Columns>

<ig:BoundDataField DataFieldName="catalogue_category_product_code" Key="catalogue_category_product_code"

Header-Text="CatalogueCategoryProductCode" HtmlEncode="false" Width="0%" Header-CssClass="gridheader"

Hidden="true" VisibleIndex="10" />

<ig:TemplateDataField Key="product_code" Width="15%" CssClass="igg_TextAlignCenter" Header-Text="Code" Header-CssClass="gridheader">

<ItemTemplate>

<div id="dvProduct" runat="server">

<div id='proddest<%#Eval("product") %>' class="dvdroppable dvDraggable" style="width: 100%;

height: 100%; cursor: pointer; white-space: nowrap;">

<%# Eval("product_description")%>

</div>

</div>

</ItemTemplate>

</ig:TemplateDataField>

<ig:BoundDataField DataFieldName="long_desc" Key="long_desc" Header-Text="Long Desc"

HtmlEncode="false" Width="35%" Header-CssClass="gridheader" />

<ig:BoundDataField DataFieldName="alpha" Key="alpha" Header-Text="Alpha" HtmlEncode="false" Width="9%" Header-CssClass="gridheader" />

<ig:BoundDataField DataFieldName="supplier" Key="supplier" Header-Text="Supplier"

HtmlEncode="false" Width="9%" Header-CssClass="gridheader" Hidden="true" />

<ig:BoundDataField DataFieldName="brand" Key="brand" Header-Text="Brand" HtmlEncode="false"

Width="9%" Header-CssClass="gridheader" />

<ig:BoundDataField DataFieldName="range" Key="range" Header-Text="Range" HtmlEncode="false" Width="9%" Header-CssClass="gridheader" />

<ig:BoundDataField DataFieldName="type" Key="type" Header-Text="Type" HtmlEncode="false"

Width="7%" Header-CssClass="gridheader" />

<ig:BoundDataField DataFieldName="color" Key="color" Header-Text="Colour" HtmlEncode="false"

Width="7%" Header-CssClass="gridheader" />

<ig:BoundDataField DataFieldName="material" Key="material" Header-Text="Material"

HtmlEncode="false" Width="9%" Header-CssClass="gridheader" />

<ig:TemplateDataField Width="0%" Hidden="true" Key="StandardPrice" Header-Text="<center>Retail Price (AED)</center>">

<ItemTemplate>

<center>

<asp:Label ID="txtStandardPrice" runat="server" Text='<%#Eval("standard_price") %>'

Style="width: 70px;" MaxLength="10" onkeypress="return checkforselectall()"></asp:Label>

</center>

</ItemTemplate>

</ig:TemplateDataField>

<ig:TemplateDataField Width="0%" Hidden="true" Key="standard_price" Header-Text="standard_price">

<ItemTemplate>

<asp:TextBox ID="txtStandardPrice" runat="server" Text='<%#Eval("standard_price") %>'

Style="width: 70px;" MaxLength="10"></asp:TextBox>

</ItemTemplate>

</ig:TemplateDataField>

<ig:BoundDataField Width="0%" DataFieldName="row_number" Key="row_number" Header-Text="RowNumber"

HtmlEncode="false" Header-CssClass="gridheader" Hidden="true" />

<ig:BoundDataField Width="0%" DataFieldName="parent_code" Key="parent_code" Header-Text="ParentCode"

HtmlEncode="false" Header-CssClass="gridheader" Hidden="true" />

<ig:BoundDataField Width="0%" DataFieldName="sort_order" Key="sort_order" Header-Text="sort_order"

HtmlEncode="false" Header-CssClass="gridheader" Hidden="true" />

</Columns>

<Behaviors>

<ig:Activation Enabled="true" >

</ig:Activation>

<ig:ColumnResizing Enabled="true" />

<ig:Selection RowSelectType="Multiple" CellClickAction="Row" >

</ig:Selection>

<ig:Sorting SortingMode="Single" Enabled="false" AscendingImageUrl="../images/sort-up.png"

DescendingImageUrl="../images/sort-down.png">

</ig:Sorting>

</Behaviors>

<ClientEvents Click="gridproductsource_RowClicked" />

</ig:WebDataGrid>