Error in event firing

Hello folks..

I have a text box in which I m trying to call a function on its OnBlur event.
The function is defined in the aspx.cs page.
Problem arises when I try to debug, it says the function Text_Blur is not defined.
Below is the code:
Front end:

<asp:TextBox ID="txtAutoComplete" runat="server" OnBlur="Text_Blur"  CssClass="TextStyleFilter"></asp:TextBox>

Code Behind, aspx.cs:

public event EventHandler OnChange;

 protected void Text_Blur(object sender, EventArgs e)
        {

            if (OnChange != null)
                OnChange(this, EventArgs.Empty);
        }

The event handler OnChange is to invoke an event in another user control.
Where am I going wrong?Any suggestions will be highly appreciated.

-Anurag

Tags: C#, ASP.NET