I have a textbox set up on a form with TwoWay binding. Form loads and data is changeable in the default load of data.

I have a dropdown to change the data on the form. This is the code that must run to SHOW the new data in the textbox.

SAED oSAED = (SAED)this.RegisterBizObj(new SAED());
string lcID = this.MmDropDownList1.SelectedValue.ToString(); //KEY
DataSet dsSAED = oSAED.GetSAE(lcID);
this.MmTextBox1.Text = dsSAED.Tables[0].Rows[0][2].ToString();
this.MmTextBox2.Text = dsSAED.Tables[0].Rows[0][1].ToString();
Session["dsSAED"] = dsSAED;

When this code executes the user CANNOT change the text in the MmTextBox1 or 2 without deleting some or all of the text that is now visible.

I am querious why I :
1) Need to set the .Text for either of these controls in new data but it works for first pull?
2) Why user can't edit (type anything in the control) on the refresh.