While dragging the ModalPopup the background goes totally gray, the background controls are not visible and if we cancell the popup again the background doesn't come up for coming background controls visible need to close the page and reopen it and again if we anybody drag the popup then again background color goes totally gray and won't come again untill the page reopens.

 Please provide some solution on it.

Thanks
 

 this is help for you

 <cc1:ModalPopupExtender ID="mpeAddTask" runat="server" PopupControlID="pnlAddTask"
                    TargetControlID="btnAddTask" CancelControlID="btnCancel" Drag="True" BackgroundCssClass="modalBackground">
                </cc1:ModalPopupExtender>
                <asp:Panel ID="pnlAddTask" runat="server" CssClass="modalBox" Style="display: none;">
                    <table>
                        <tr>
                            <td align="right">
                                Task Tilte
                            </td>
                            <td align="left">
                                <asp:TextBox ID="txttaskName" runat="server"></asp:TextBox>
                            </td>
                        </tr>
                        <tr>
                            <td colspan="2" align="center">
                                <asp:Button ID="btnAdd" runat="server" Text="Add" CssClass="but" />
                                <asp:Button ID="btnCancel" runat="server" Text="Cancel" CssClass="but" />
                            </td>
                        </tr>
                    </table>
                </asp:Panel>

here the Css :

 .modalBackground {
    background-color: Gray;
    filter: alpha(opacity=50);
    opacity: 0.5;
}
.modalBox {
    background-color : #f5f5f5;
    border-width: 3px;
    border-style: solid;
    border-color: Blue;
    padding: 3px;
}

Thanks

kutti A

 I am nt clear on what you mentioned by 'dragging' the modal popup. I have tested your code and i cnt reproduce the issue u hav mentioned.

I have already use the same code but the problem remains.

The popup panel having very large data in grid view controls and when we drag the popup it locks the screen for a sec. or two and background goes totally gray which we specified in the CSS.

 The situation like when we don't specify the filter:aplh(opacity=70) in background situation then how the screen comes exactly the same situation arises when I drag the Modal popup.

Please provide the solution for this. 

Thanks for your replay.
 

How do you drag the popup, i mean which portion of the popup you use for dragging, is it the panel text? Can you put a screen shot?