microsoft jscript runtime error out of memory

[AjaxPro.AjaxMethod]
    publicbool UpdateCoupons(int ID, int CouponsNo,int TripsNo ,int GPSNo)
    {
 
        if (CouponsNo == null) CouponsNo = 0;
        if (TripsNo == null) TripsNo = 0;
        if (GPSNo == null) GPSNo = 0;
 
       // if (string.IsNullOrWhiteSpace(Exemption)) return false;
try
        {
            using (Model.NadafaEntities context = new Model.NadafaEntities())
            {
                context.cap_ChangeCoupons2(ID, CouponsNo, TripsNo, GPSNo, HttpContext.Current.User.Identity.Name.ToLower());
            }
            returntrue;
        }
        catch (Exception ex)
        {
            returnfalse ;
        }
    }