[pdftex] including the existing pdf document

[kewal]

Hello
How to  include  already existing  pdfs into my new file which is to be
compiled ? i tried it using pdfpages package, but wasn't succesful. I
included this in my preamble


\usepackage[2-5]{pdfpages}

and in the body included this -

\includepdf[2-5]{datasheet}


where i wanted to include the datasheet,... any otherway around to include
the already existing PDFs??? i need to get the page no's in the new document
properly...



-- 
Kewal. Deshpande