How to Set-up a Vox ad50vt ?

Hi Im new here and i don't know if Im at the right place,

My Gear is:
- Amp: Vox Valvetronix Ad50vt
- Guit: Ibanez rg270
- Effect- Digitech Metal Master

I have some difficuty to set-up sound for these two kind of music

1- Rock Sound: like Fall Out Boy
2- Metal Core: sound like Killswitch Engage

I tried to turn button in all direction but nothing sound good

Can help me to find a good sound for my amp please and can you answer me in "o'clock" mode