Hers is what i want to happen a user clicks a button and it post back to the Server for some code execution. I check for errors and if found i load the DialogBox with the Error Message and then using RegisterStartupScript i show the Dialog box. This is trying to be accomplished with an MS UpdatePanel. I get the Dialog to show up but the Error Message in the dialog box isnt updateing.

I tried this with 2 seperate update panels. When i move the dialog box inseide the same update panel as the button the startup script erros and saysi the dialig box is null.