Weird One!! CAN'T GET NEW VALUE OUT OF TEST BOX ?!?!

hi
I got a really weird problem. I create a dataset put the value into a textbox. I don't bind to it because it's not going to update the database:

For Each CurRow In CurRows
Me.TxtAssetNO.Text = CurRow("TAGID")
Next

The user adds some more characters, then presses a button and the new value should be displayed on the screen.

Response.Write(Me.TxtAssetNO.Text)

But Instead it writes the old value and then refreshs and the old value gets displayed again. What the hell am I doing wrong?