[Q] not able to root acer liquid e700 topic

i bought an acer liquid e 700 phone.i have tried to root it using kingoroot,framaroot,eroot,one click&finally using sp flash tool provided on our forum.none of these have worked.my kernel version is 3.4.67.built no is acer_av0k0_e39_1.022.00_aap_gen1.i used the sp flash tool to root&flash cwm recovery.clicking'download',gives me a message -"PMT changed for the ROM:it must be downloaded".what does that mean.i have rooted many devices like htc-1 v,lg optimus 2x,samsung 4s mini.one of the above methods has always worked.but not for acere700.can anyone help?