Cant be make backup of Micromax canvas gold A300 through Mtk droid tool

IHi
I have successfully done rooting of device Micromax canvas gold A300 through sp flash tool by flashing cwm recovery by using scatterfile file was present in firmware later I tried to backup my rom through mtk droid tools, I have got an error ie'
ERROR : system it was not remounted on ReadWrite!

ERROR : file adbd not install !

This occurring SuperSU permission granted in my phone...
Please help me to backup my rom...
I using Windows 7
Installed drivers are Android sdktool, mobistel cynus t1 , universal USB drivers,and USB drver Micromax canvas gold A300
My software version is T22
And help me to install Android sdktool correctly for this actions:crying::cyclops: