Unable to convert file to UTF-8

I am on Windows XP sp3 and I am trying to convert a file from ASCII to UTF-8.

I use notepad++ to do this. I go to Encoding > Convert to UTF-8 without BOM. I save the file, reopen and it is still on ASCII.

I am using this file in a webpage and I need the file to be UTF-8, because I have strings in utf-8 and they am seeing little squares with ? on them.

Do the following:

1. File->New
2. Encoding->Encode in UTF-8 without BOM
3. Copy and Paste your original text into this new file
4. Save.
   

It works on my computer with Windows XP SP3 and Notepad++v5.6.8. Hope it works on your computer also.