Greek editing in Acrobat 7

Hello,

I'm using Acrobat 7 and its TouchUp Text tool in order to write some greek phrases in a pdf document. However, unreadable characters show up when I type them. I have installed Greek(layout Greek(220)) in my window system, and when pressing alt-shift it changes the input language from english to greek. But I can't write the greek inside the pdf.

Any thoughts?

thanks,

Antony