글쓰기하고 저장하면...

아래와 같은 에러가 계속 떨어집니다.

Warning: Prepare fails (E [SQLSTATE=IX 000 SQLCODE=-617]) in /usr/local/apache/htdocs/myung/mtboard.php on line 415

Warning: Supplied argument is not a valid Informix Result resource in /usr/local/apache/htdocs/myung/mtboard.php on line 417

글쓰기에 문제가 째끔 있네요

mtboard.php 글쓰기 소스---------

function write($name,

$email,

$title,

$password,

$content)

{

$que="select max(parent_id) from board";

$this->rlt = ifx_query($que, $this->con);

$parent_id = ifx_fetch_row($this->rlt, "first");

$max_parent_id = $parent_id["(max)"] + 1;

ifx_free_result($this->rlt);

$title=htmlspecialchars($title);

$name=addslashes($name);

$title=addslashes($title);

$content=addslashes($content);

$date=date("Y.m.t");

$time=date("h:i:s");

$password=crypt($password, $password);

$blob_content=ifx_create_blob(1, 0, $content);

$blob_id[] = $blob_content;

// echo $email.$title."<br>";

$que="insert into board (parent_id, name, title, date, time, password, email, content) values

('$max_parent_id','$name','$title', '$date', '$time', '$password', '$email', '$content')";

echo ($que);

$rid=ifx_prepare($que, $this->con, $blob_id); ====> 415

if(!ifx_do($this->rid)) { =====>417

die ("글쓰기에 문제가 째끔 있네요");

echo ifx_error();

return;

}

}