Help Huawei Ascend G510 fastboot not worked :(

[Android Question]

Hello Experts.
How can I put my Huawei Ascend G510 into "Fastboot mode" ? I read below link but not worked :

http://theunlockr.com/2013/07/30/how-to-flash-a-custom-recovery-on-the-huawei-ascend-g510/

When I holding down Volume DOWN+Power buttons together not happened anything

Tnx.

 

[Slug]

So what actually happened , the device booted normally? You did power it off before trying the POWER+VOL_DN combo?