HELP bootmii backup nand key issues black screen

Ok i know my topic is everywhere but I dont understand what the deal is. Bootmii loads fine and im able to nav thur it but sys menu and the hbc just loads up the black screen. noob mistake i never made a backup when i modded this but i did now and i have only 3 bad blocks i think it stated under info im at 83% factor i dont know. but i have a nand.bin but no keys.bin when i did the backup which i got no errors while backing. What should i do? ahhhh!

sys 3.4u
bootmii ver. boot1-boot2
ios249

The system menu doesnt load because you effed it up somehow.

The HBC doesnt load because you have the wrong version installed for your version of BootMii.

Also, may I ask why you have a functional IOS installed as 249?