I am now unable to attach files.

I have been using emails without problem until recently but since a few days ago, it suddenly happened that I now cannot attach files. I have reinstalled software but still I cannot. I was asked to ask email provider so I asked nifty but they have not responded. Another issue, after reinstalled software, description is now shown in English. I can understand it but I would like to know how it can change to Japanese. I would appreciate very much if someone can help to solve this issue. Thank you very much. redacted@nifty.com