It returns prints "Done" even the file "C:\WINNT\aaaZemestrostd-bk.otf" dosen't exists.

OK, so it appears that the module is broken -- if it doesn't return an error when a specified file is missing, that's an error.

The font you want to use may not be supported, as you suspect. See if you can get in touch with the authors to get this figured out, and good luck. :)