headphone volume problem on Vfx using UMC PRO

hi mivibes!
i often use UMC PRO for my Vfx software because of no need the adapter (usb powered only) it makes me comfortable & less set up during my gigs, but the volume of headphone is very low! i cant hear when im at the club. i reinstall it and install both Vfx and UMC PRO driver several times but still the volume is low.
pls.. thanks!
i often use UMC PRO for my Vfx software because of no need the adapter (usb powered only) it makes me comfortable & less set up during my gigs, but the volume of headphone is very low! i cant hear when im at the club. i reinstall it and install both Vfx and UMC PRO driver several times but still the volume is low.
pls.. thanks!