How do I Update a textbox.text field when its nested inside a LoginView?

[Jacob Donajkowski]

I want to change the text inside a textbox that is inside a loginview
but it won't work using the .findcontrol function. I have tried :

textbox tb = loginview1.findcontrol("textbox1");
tb.text = "New String";

but that dones't work for me.

Can anyone help?

Thanks

Jacob