Question Phpbb3 to Kunena / Fireboard Migration-Problem => Converter stopped without migrate users

Hi,

follow the description from here
docs.kunena.org/index.php/PHPBB3_to_Kunena

want to migrate from a phpbb3 Forum to Kunena, but if I start the converter it stops and only the topics and categories are migrate (with wrong umlauts) not the users.

This are the messages from the converter, after this it stops:

Importing data from phpBB
Connecting to Database... OK
Populating Categories... OK OK
Populating Messages Table... OK
Populating Messages_Text Table...

My Data:
Joomla 1.5.22 (empty without users or anyting)
Phpbb3: 3.0.6 | User: 1770 | Topics: 126038
MySQL: 5.0.51a-24+lenny4
PHP: 5 ( But with 4 it didn´t runs also)
Server time Out is 300sec enough I think, tested it with 500 with the same result

Can you help me

One step forward.

Can integrate all, but the code for the "//Populate Messages_Text Table" didn´t runs:

//Populate Messages_Text Table
echo "<br />Populating Messages_Text Table...\n";

$query="TRUNCATE TABLE `$joomla_db`.`{$joomla_dbprefix}fb_messages_text`";
$result = mysql_query($query) or die("<br />Invalid query:<br />$query<br />" . mysql_error());

$query="SELECT post_id, post_text FROM `$phpbb_db`.`{$phpbb_dbprefix}posts`";
$result = mysql_query($query) or die("<br />Invalid query:<br />$query<br />" . mysql_error());
$mtext = array();
$mpostid = array();
while ($row = mysql_fetch_object($result)) {
$text = addslashes($row->post_text);
$mtext[] = prep($text);
$mpostid[] = $row->post_id;
}
mysql_free_result($result);

for ($i=0; $i < count($mtext); $i++){
$query="INSERT INTO `$joomla_db`.`{$joomla_dbprefix}fb_messages_text`"
." (mesid, message) VALUES"
." (".$mpostid[$i].", \"".$mtext[$i]."\")";
$result = mysql_query($query) or die("<br />Invalid query:<br />$query<br />" . mysql_error());
}

echo "OK\n";

solve this Problem: rename the phpbb3posts table to fb_messages_text and delete alle rows without post_id and post_text and rename them to mesid and message