cannot provide super user permission in android using runtime.exec("su") , provides : Cannot run program "su": error=13, Permission denied

[adeach]

I have rooted android device and enabled READ_LOG permission also, still provides Cannot run program "su": error=13, Permission denied.
please suggest me If am missing anything
Thank you

[balkoev]

I have rooted android device and enabled READ_LOG permission also, still provides Cannot run program "su": error=13, Permission denied. please suggest me If am missing anything Thank you

Did you find solution?