Get total page

Hi,

Is there anyone who can help me to get a total page of a document? Actually, I 
followed what this url  
http://www.sagehill.net/docbookxsl/PrintHeaders.html#ConsecutivePageNumbers  
described,  but I met the following message: ".... unresolved 
id="END-OF-DOCUMENT";.."

I don't use XEP but XALAN for processing.

Best regards,

Solofo