That is because Adobe Reader 9 does not have commenting features :)
Adobe Reader XI has commenting and highlighting:
Can I use Reader XI to add comments and highlights to a PDF file?
Reader XI is the first version of Reader that enables users to annotate PDF documents using a full set of commenting and markup tools, including sticky notes, a freehand drawing tool, and typewriter, highlight, underline, and strikethrough tools. You can also use Reader XI to participate in shared document reviews, with team members seeing and building on each other’s comments to speed up review cycles.
Source: http://www.adobe.com/products/reader/faq.html
Check this post for pdf commenting.
Evince is a PDF viewer able to open PDF files at a specific page using the terminal with the following command:
evince -i 5 "path/to/document.pdf"
where -i option specifies the page of the document, 5 in this example, and the second argument specifies the path to the document to open.
Okular is a PDF viewer able to open PDF files at a specific page using the terminal with the following command:
okular -p 5 "path/to/document.pdf"
where -p option specifies the page of the document, 5 in this example, and the second argument specifies the path to the document to open.
Acrobate Reader is a PDF viewer able to open PDF files at a specific page using the terminal with the following command:
/opt/Adobe/Reader9/bin/acroread /a "page=5" "path/to/document.pdf"
where page=5 is the argument that specifies the page of the document, 5 in this example, and the second argument specifies the path to the document to open.
Best Answer
First Install ia32-libs package from ubuntu-software-center, then reinstall adobe reader.