Is there any way how change text encoding of PDF file in PDF Architect?

I am looking for some way how change text encoding in some PDF files. If
they are created by Microsoft Reporting Services PDF Rendering
Extension 9.0 I cannot read them, text is garbled (probably because of
czech diacritic). If I open same file with i.e. Acrobat Reader,
everything is fine. However switching between two applications is really

I am using PDF Architect on Win 7 (64 bit).

Thank you for any suggestions.