gamebase/atari800win help needed

[advfan]

I'm using the Gamebase frontend with Atari games and the Atari800Win+4.0 emulator. While I have no problems when starting and changing games in .atr or .atx files (they start directly when you select the game), if I try to do the same with cartridge (.rom) and cassette (.cas) files, I always get the boot error message.
Also, if I manually select e.g. a cartridge and run it and if I try to select another one later thru Gamebase, it will always start with the one previously loaded.
I've tried changing settings on the emulator, but nothing has helped so far.

I think it may be due to the way the emulator is designed, as with Vice or CCS for the C64, the emulator seems to have no problem with this. I can load a .tap file and later select a .g64/.d64 one, and it will load both with no problems.

Any ideas on how to be able to load all those files just by pressing 'play game' on gamebase? Thank you.