Setting a string property of user control from parent page button click event not working

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C#

ASP

I have a user control ProfileSetup.ascx with property

[DefaultValue("")]
        public virtual string Name{ get; set; }

The user control is shown in HomePage.aspx as a modal popup

<als:Panel ID="pnlProfilePopup" Style="display: none;" Width="100%" runat="server">
            <cgf:CustomProfile ID="ccProfileSetup" runat="server" />
        </als:Panel>

In HomePage.aspx there a "Profile" button

on click of "Profile" button I set the property of user control

ccProfileSetup.Name = "ABC";
myModalPopup.show();

but when the popup opens the Name property is null or ""

Please provide a solution. when i do it from aspx it works

<als:Panel ID="pnlProfilePopup" Style="display: none;" Width="100%"  runat="server">
            <cgf:CustomProfile ID="ccProfileSetup"  runat="server" Name="ABC" />
        </als:Panel>

can it be done from code behind event?