i meet a problem when use %SQLGatewayConnection

 i use %SQLGatewayConnection to insert data to mysql from xml，when if the value`s ascii of any field in the sql equal to 57659 ，

ClassMethod Execute(sql, conn, Output msg) As%Status
{
    s$zt="Err"
    s msg=""
    k hstmt
    set sc=conn.AllocateStatement(.hstmt)
    set sc=conn.PrepareW(hstmt,sql) 
    
  if$$$ISERR(sc) quit sc
  //Execute statement
  set sc=conn.Execute(hstmt)
  if$$$ISERR(sc) 
  {
      k err
   Set xsc=conn.GetErrorList(hstmt,.err)
      set sc=conn.DropStatement(hstmt)
   ;Zwrite err
   Quit err
  }
    set sc=conn.DropStatement(hstmt)
    q$$$OK
Err
    ;w $ze,!
    q$ze
}

this method will stop at this line ' set sc=conn.PrepareW(hstmt,sql) '，and this time ，sql is a insert statement， without error。any solution? and 57659 is just a example，others like 57634.