Cannot use external fonts on s60v5

I am using N97, 22.0.011 (firmware versions)
I tried Qt4.6.3 and Qt 4.7 library on this phone, and I found this bug:
If I use Font Rounter (A font changing program), and I use font file which is Arials (containing all general languages because I want my phone to display texts in Chinese, Korean, Japanese actually the name of songs in my library). And I found that if I turn Font Rounter on, texts in programs written by Qt don't work. I run fluidlauncher and every demo program is named "CCCCCC"
I also tried softwares which were written by Qt, from this website http://www.summeli.fi/ (gpSP, AntNes etc.) and any buttons is displayed in "wwwwww"
I tried to turn of Font Rounter, and everything work fine. But If I use Font Rounter, all apps except Qt apps work fine
I don't want to copy the font to E:\Resources\Fonts because whenever I choose Mass Storage when I connect my phone to the computer, the phone restarts; so I choose Font Rounter, but Qt apps don't work. Please Fix this bug because I want to develop many apps by Qt