Sharepoint - Document Properties (SiteColumns) not updated

I have a problem with Sharepoint and Aspose Word/PDF.
I have a word document in my document library, if i change properties of the document in sharepoint document library (site columns of content type), for example start date change to 2011-11-01 (old: 2011-09-21) and i convert it to pdf with Aspose i see old date in pdf document.

If i open document with word, word updates document properties and show correct new date of site column value (2011-11-01). If i saved this updated document in word and convert it with Aspose the pdf are correct.

At the moment i open the document with Aspose Word (Document) and convert it to pdf with Aspose PDF. I call UpdateFields on open document, but method call has no effect.

Give it a another method to update document properties? Can Aspose Word/PDF update this properties?

Regards
Firgor

Hello
Thanks for your request. Could you please attach your input and output documents here for testing? I will investigate the problem and provide you more information.
Best regards,