Problem with adobe pdf

Sukanto Chakraborty (Accountant) (101 Points)

05 June 2012  
member plz advise.I have nokia E-5 mobbile. It has adobe pdf.It is a new ver[1:11;2011]. but some pdf file like amendment ,case study of icai is open in it.If i try to open it a massage[unsupported security handler] is on my also has ms office.what should i do