>Hi,
>
>I have a textbox defined like this:
>
>

<mm:mmTextBox ID="txtClientNumber" runat="server" BindingSource="Client" BindingSourceMember="ClientNumber" 
>                        OnTextChanged="txtClientNumber_TextChanged" AutoPostBack="True"  
>                        Width="92px"></mm:mmTextBox>

>
>I want that the txtClientNumber_TextChanged fires whenever the text changes in this textbox. However, the code fires only the first time the text changes, but I want it to fire every time.

Are you sure you want to handle this logic on the Server (I'd think AutoPostBack = "True" should work) or on the client?