Question [Q] Total Commander system mount error

Hi,
I am rooted but I can't mount system as r/w in totalcmd, it throws me error. Root Explorer works fine. Do you have same problem ? On my HTC Wildfie S I can mount system as r/w without problems. Is there anybody who can mount system as r/w on S4 mini ? Total commander is not optimized for s4 mini or problem is only on my device ?