Gridview row updating why can't work with web service

[cutexxbaby]

anyone can help me solve this problem, i am using the web service to get the update method into the grid view row updating but i got error not sure how to solve it...please help me!!!

thanks in advance

this is my code...

protected void Page_Load(object sender, EventArgs e)   
    {   
        if (!IsPostBack)   
        {   
   
            BindNominal();   
        }   
   
   
    }  
 
protected void GV_Update_RowEditing1(object sender, GridViewEditEventArgs e)  
    {  
        GV_Update.EditIndex = e.NewEditIndex;  
        BindNominal();  
  
    }  
   protected void BindRollInfo()   
{   
        //this is the proxy u saying   
        WSRollInfo.WSRoll roll = new WWSRollInfo.WSRoll();   
        GV_Update.DataSource = roll.GetAllRoll();   
        GV_Update.DataBind();   
} protected void GV_Update_RowUpdating(object sender, GridViewUpdateEventArgs e,int Roll_ID, String Roll_Data, int Status) 
    { 
        WSRollInfo.WSRoll updateRolls = new WSRollInfo.WSRoll(); 
        GV_Update.DataSource = updateRolls.updateRoll(Roll_ID, Roll_Data, Status); 
        GV_Update.DataBind(); 
        BindNominal(); 
 
    }

[dnanetwork]

set up a debug point. see if it reaches the RowEditing Event.

if no then Delete from Mark up and Delete from Gridview Event and
agaian generate the new RowEditing Event.

if yes then check this out. may be you are missing some part.
http://www.codeproject.com/KB/webforms/Editable_GridView.aspx