How can I get paypal to display german characters? öäüß?

I have set
define('CHARSET', 'iso-8859-1');
@setlocale(LC_TIME, 'en_US', 'en_US.ISO_8859-1', 'English');

in the german-php language file... along with converting the entire german language pack to ANSI format.

Now all my pages display the characters correctly. However, I tried setting the encoding to 'iso-8859-1' in paypal profile settings. But the special characters are still displaying as �

Thanks in advance