Enable "Ping" for Speedtouch 7800 WL

[Kloppstock]

I need help enabling ping on my speedtouch 780 WL router..so i can be able to drive some "Line testing tools"

ping is disabled as deafult on my model unfortenley for me

i can't use Telenet to change settings in the router

i instead use the GUI, and change ore add lines in the dokument to change settings and then load the updated dokument back again as primarys settings
in the router, this worked well wdding "config natloopback=enabled" so i hope i can do the same with enable "Ping"

i have search throu the GUI, but offcorse i cannot find the lines i need to find to bo able change this

the lines we talk about is
http://thicksliced.blogspot.com/2006_07_01_archive.html

"service system ifadd name=PING_RESPONDER group=wan"

the problem with this cheat method i use is..if i dont find the right lines to change..i will no either be able to just write and add a own line
cause then there will be doublette lines

and when i cant find it, how will i ever know where inside the dokument this line shall be pasted in the first place..its pretty mutch text

i really need to get this working so im accually post the "user config"-dok below here, perhaps you have better luck finding thoose lines than me?

impossible to attach the GUI-file directley
som im forced to:

http://www.megaupload.com/?d=I8TZBKRP (78 kb)

thanks in advance