PPPOE connection error- plz help!

[200x200]

Hi.
I have Lenovo A2107A-H with android 4.0.3 and i rooted this tablet.
I download several PPPoE apk and install them.
But they can not connect pppoe ADSL.
for exam the software: PPPoE for Android show me this errors:

couldn't set tty to ppp discipline: invalid argument
pppoe: read (asyncReadFromppp): Session 2280: input/output error
pppoe: read (asyncReadFromppp): Session 2326 : input/output error

therefor i can not use pppoe internet connection.:'(
please help and show a solution.
Thanks