[Beaglebone] How to start DVI-cape on Beaglebone?

Hi everybody, i 'm adding video modul for my beaglebone ( custom Beaglbebone) i reference DVI-cape Schematic. I has program eeprom on DVI-cape, now my beaglebone recognize DVI-cape, but when i connect to HDMI - LCD, nothing aperance in my monitor. How can can chect my beaglebone has register FB driver? and how to config environment varialbel in Uboot for my DVI cape?