Cannot open xlsx files with Trados Studio 2014

Hi, all.

When I try to open xlsx file with Trados Studio 2014, there is an error message saying "Invalid File format". I converted the file into ods. and again the error comes, " The file xxx cannot be opened as it contains languages that are not configured for this installation."

I tried a csv file and a doc file, but I got similar messages.

I used to open doc and xlsx files while ago with this version of Trados.

Does anyone have an idea to fix this?