jQuery Grid Plugin - jqGrid

I have an strange error...

"This page contains the following errors:

error on line 3 at column 1: Extra content at the end of the document

Below is a rendering of the page up to the first error."

00 (two zeros)

What is it?

Fragment that generates XML:

echo "<?xml version='1.0' encoding='utf-8'?$et\n";

echo "<rows>";

echo "<page>".$page."</page>";

echo "<total>".$total_pages."</total>";

echo "<records>".$count."</records>";

// be sure to put text data in CDATA

while($row = mysql_fetch_array($result,MYSQL_ASSOC)) {

echo "<row id='". $row[ID]."'>";

echo "<cell>". $row[ID]."</cell>";

echo "<cell>". $row[indeks]."</cell>";

echo "<cell><![CDATA[". $row[symbol]."]]></cell>";

echo "<cell><![CDATA[". $row[nazwa]."]]></cell>";

echo "<cell>". $row[cenaNetto]."</cell>";

echo "<cell><![CDATA[". $row[waluta]."]]></cell>";

echo "<cell><![CDATA[". $row[wysokoscObliczeniowa]."]]></cell>";

echo "<cell>". $row[IDRodzaj]."</cell>";

echo "<cell>". $row[IDTyp]."</cell>";

echo "</row>";

}

echo "</rows>";?>