Please give me any suggests!

Hi  I'm using some functions about a dom xml. the first one is
domxml_xmltree().

I have this error message in error.log of Apache when I ask to my function
to
call the function  domxml_xmltree(). BUT Not always :(.

                        Premature end of scripts headers c:/php/php.exe.

I use the imap_bodyfetch to take the xml doc from body mail and i use the
imap_base64 or others to encoding the attached doc.
I get a right document  and I suppose this because I save the document and
when I open it I can see it in the browser like a right structure xml.

Like I've already told during the reading of some mails(then some xml doc) I
have no problems.

Sometimes my browser does not complete my request e give this message
"INTERNAL SERVER ERROR". At this time I can't go on.

Sometimes I have this alert php.exe application error, after the page is
displayed in the browser correctly and I can go on.

I've downloaded the latest version of libxml but I use PHP Version 4.3.1 and
then I have to take only iconv library.
And I've downloaded the latest version of it.

Kind regards

Valentina.