Howto: install a plugin acrobat reader in google chrome

I am having trouble to open web pdf file with acrobat reader 9.2 in google chrome. it opens them with google pdf doc viewer. I guess some how the plugin is missing or something else. Firefox opens them without any problem.

when i open a saved pdf file with chrome, it duplicates the file (redownload) but it does not open it.

Anyone with a suggestion!!?