Xecure
A. First try updating the live system before installing (everything that updates/upgrades before installation will be included in the installed system). I know there was a grub2 update recently to fix some vulnerability (that broke my boot, but that is another story), so maybe it is recommended to have everything up to date before installing antiX to your system.
B. If it still doesn’t work, you can also install without grub and then use Control Centre > Maintenance > Boot repair to try to install grub again (from the live system).
Go back to live CD/USB and do:
Control Centre > Maintenance > Boot Repair > Repair GRUB configuration file. Follow the steps and it will fix grub.
For more info, take a look at this thread: http://www.antixforum.com/forums/topic/cannot-install-antix-grub-installation-problem/
antiX Live system enthusiast.
General Live Boot Parameters for antiX.