Thats because Easy CD creator uses a packet writing filesystem to write (UDFS) which is not compatible with most things, including Amigas, personal CD-R players, DVD players... As far as I know only Easy CD creator and Windows XP support this. Probably others things do, but the Amiga doesn't.
Get rid of Easy CD creator and write your CDs with Nero instead. Packet writing is ok if you only want to use the CD on Windows, useless everywhere else.
