Default Problem Setup SuperSU

1st time used Framaroot, I had no problem rooting my Samsung Core GT-I8262. One day I decided to uninstall Frama & SuperSU, but when I downloaded some apps requiring root. It was impossible to resetup SuperSU. I tried all means with no success.
So plz if any help, I'll be geatfully thanking.
Till then, am counting the seconds....

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