Please help me to manual start VPN l2tp.

i was using cmd : pfSsh.php playback svc status l2tp is errors

| pgrep: Cannot compile regular expression `' (empty (sub)expression)

Service l2tp is stopped. |

when using pfSsh.php playback svc start l2tp

output is :

Attempting to issue start to l2tp service...

l2tp has been started.

but l2tp is stop after 1 sec.

how i can check errors and fix this.

Thanks