I tried that, adding this line after FBA options, and CAPEX options too, but nothing happens. My roms are working, i tried them with CPS2 and MAME too (for example SFAU.zip, US version of Street Fighter Alpha). Should i take a screenshot, or write down what's in my capex.cfg?
cd /home/user/MyDocs/roms fba ./<yourgamerom.zip>