Hi, this probably happens if you use Hyperion's ROM with WinUAE. Please try ROM3.x or 3.1 instead.
I don't visit this server very often, therefore for support and faster replies please start a thread at
www.forum.amiga.sk or drop me an email. I will need to know your host OS version as well as your AmigaOS&ROM version so I can troubleshoot. Thanks!