[Q] installing the xposed framework on lenovo A3500HV with android 4.4.2

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To anyone who may be concerned,
Please help me with the following issue for rooting my tablet.
I have a lenovo A3500_HV, but i have upgraded the android to kitkat(4.4.2).
During the rooting process, when i want to install the xposed framework it
is not responding & keep writing msg."you have not the root access or not
rooted properly"whilst to root the device this one should be done first.
Please help me.i'm really getting mad,awake till morning!
Bst rgrds.