[求助]关于PHP与Oracle的问题

PHP源代码如下
$sql="INSERT INTO TB_MANMASTER('EMPNO','E_NAME','TEAM','TEL','PASSWORD','ID_NO','USERID') VALUES ('10001','xx','Management','512','123','001','caron')";
$stmt = OCIparse($Conn, $sql);
if(!OCIexecute($stmt)) echo $sql;
OCIFreeStatement($stmt);

执行后提示信息如下:
Warning: ociexecute(): OCIStmtExecute: ORA-00928: missing SELECT keyword

使用SQL语句在SQL_PLUS下执行INSERT INTO TB_MANMASTER('EMPNO','E_NAME','TEAM','TEL','PASSWORD','ID_NO','USERID') VALUES ('10001','xx','Management','512','123','001','caron')"; 语句同样报错
ORA-00928: missing SELECT keyword.

请问是什么原因, 谢谢.

P.S:
系统环境:
RH Linux 8.0
PHP 4.3.4
Oracle 8.1.7:confused:　　　　　　

把前面的'EMPNO','E_NAME','TEAM','TEL','PASSWORD','ID_NO','USERID'这些''去掉看看.