PDF to other format conversion problem

Hi,

I have these issue with the pdf.save function and the document attached:

Codes:

Document m_pdf = new Document(m_strFileName);
 
m_pdf.Save("test.xls", SaveFormat.Excel);
--> when excel open it we got a message file "corrupted"
 
m_pdf.Save("test.doc", SaveFormat.Doc);
m_pdf.Save("test.docx", SaveFormat.DocX);
--> Same type of message but the word version
 
m_pdf.Save(strDestination, SaveFormat.Html);
--> out of memory exception
 
Could you please have a look?
 
Thanks
Best regards