Import a tiff

Hello,

I need to import a .tiff into Adobe Reader XI.  My older version of Adobe Reader X allowed me to simply select open file and then view all file formats.  I would select the .tiff and it would open.  I could then save it as a pdf.

However, following the same routine Adobe Reader XI sends me an error message:  "Adobe Reader could not open .....tif' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded)."

I tried opening the .tif file on my old laptop and it opened fine.  Therefore I don't think there is an issue with the file being damaged.

Suggestions on how to import .tiffs in Reader XI?

Much appreciated.

EH