我用ADO.NET 调用存储过程会出现

( - + case mod new not null
   <an identifier> <a double-quoted delimited-identifier>
   <a bind variable> continue avg count current exists max min
   prior sql stddev sum variance execute forall merge time
   timestamp interval date
   <a string literal with character set specification>
   <a number> <a single-quoted SQL string> pipe
   <一个带有字符集说明的可带引号的字符串文字>
   <一个可带引号的 SQL 字符串> purge
符号 "(在 ":" 继续之前已插入。

存储过程是：

create or replace procedure usp_SetRoleRight
(
   v_roleid in integer,
   v_modelid in integer,
   v_rightid in integer,
   v_enabled in integer
)
is
v_rowcount int;
begin
    select count(*) into v_rowcount from T_roleright where roleid=v_roleid and modelid=v_modelid and rightid=v_rightid;
    if v_rowcount = 0 then
      insert into T_roleright(ROLERIGHTID,roleid,modelid,rightid,enabled) values(S_T_ROLERIGHT.Nextval, v_roleid,v_modelid,v_rightid,v_enabled);
  else
   update T_roleright set enabled=v_enabled where roleid=v_roleid and modelid=v_modelid and rightid=v_rightid;
    end if;
    commit;
end usp_SetRoleRight;

我调用的方法是：

OracleConnection connection = new OracleConnection(connectionString);
   OracleDataReader returnReader;
   connection.Open();
   OracleCommand command = BuildQueryCommand( connection,storedProcName, parameters );
   command.CommandType = CommandType.StoredProcedure;
            returnReader = command.ExecuteReader(CommandBehavior.CloseConnection); 

希望大家帮忙下！