It was my understanding that PHP could display the following character sets, so they are the ones I added to the array in the source code for the selection form:
'ISO-8859-15', 'ISO-8859-1', 'cp1252', 'UTF-8', 'cp866', 'cp1251', 'KOI8-R', 'BIG5', 'GB2312', 'BIG5-HKSCS', 'Shift_JIS', 'EUC-JP'
I'm not sure what would happen if you added your ISO code and description to the arrays in the source code. Are you saying you tried that and it did not help?
The only thing I can think of is to select the same code as your database and see if that works, or select UniCode (UTF-8) and see if that works. Sorry I'm not much help.