Kppp and pppd for K18.04.3 for dialup

[ray burke]

Can anyone out there help me please-

I am testing out a new K18.04.3 that I have installed on a 160gb sata drive.
I have included most of my files from my K14.04, which I use for dialup
to the internet.
I have downloaded to current 223 updates for the K18.04.3 LTS and also installed
Kppp and pppd(red telephone icon) but having problems with Kppp as cant update
anything thru Kate or Nano as not write permissions.
With pppd I have problems with below-
*************************************
Username:
--> Don't know what to do!  Starting pppd and hoping for the best.
--> Starting pppd at Mon Oct 14 13:47:53 2019
--> Warning: Could not modify /etc/ppp/pap-secrets: Permission denied
--> --> PAP (Password Authentication Protocol) may be flaky.
--> Warning: Could not modify /etc/ppp/chap-secrets: Permission denied
--> --> CHAP (Challenge Handshake) may be flaky.
--> Pid of pppd: 1813
--> Using interface ppp0
--> pppd: ��E ��E
--> pppd: ��E ��E
--> pppd: ��E ��E
--> pppd: ��E ��E
--> Disconnecting at Mon Oct 14 13:48:23 2019
******************************************************

Can someone help?

Ray