Problems with tn5250j on OS X 10.3.9

I use 10.3.9 on my PowerBook and I'm getting this when I go into SEU:



I would love to be able to *everything* from my PowerBook, instead of 
switching back and forth between Mac and Gentoo (not that I mind using 
my Linux box, you understand...it's just that I LOVE LOVE LOVE my 
PowerBook ;-)

Everything else seems to work okay. Any help you could give me in this 
regard would be EXTREMELY appreciated.

Thanks!

Jon Brisbin