From the EurekaSound website I gather that the EurekaPROM is an alternative EPROM firmware chip, with programming options that differ from Behringer's firmware.
FCB1010 Manager expects Behringer's standard firmware, so it's probably incompatible with the EurekaPROM (just as it is incompatible with Ossandust's UnO firmware).
From the EurekaSound website
From the EurekaSound website I gather that the EurekaPROM is an alternative EPROM firmware chip, with programming options that differ from Behringer's firmware.
FCB1010 Manager expects Behringer's standard firmware, so it's probably incompatible with the EurekaPROM (just as it is incompatible with Ossandust's UnO firmware).