Help need root to sky device "fuego" 4.0d

Greetings, I need your help, I need to have root access on my device SKY "FUEGO" 4.0D, I have used many tools for root access failed way:

-FRAMAROOT
-KINGROOT
-KINGOROOT
-SRSROOT
-vroot
-IROOT
-ROOTGENIUS

I have also tried using "MTK DROID TOOLS" because this device is MediaTek architecture, but the program does not recognize my device

I find nothing in networks, please help

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