I will give it another try.
I just used nano to edit it.

I altered the class_core.php file with your code, Paul, and I get a strange symbol at the top left corner of the site. Picture is attached.

When I install the default class_core.php file, it goes away.

Any word on this issue? ^^^

Only that its an issue with your editing of the file.

if a user is banned...and he try to enter to the forum using a proxy...will he be able to enter the forum or this mod will detect him and denied him the access to the forum?

No, this will not ban anyone.

no, im not speaking about this mod will bann a user...

i will say in other words what i want to say :) :
if i use this mod....
and a user access the forum through a proxy
will vbulletin see his real ip or his proxy ip?

and..if user is banned..if vb can see his real ip, he will not be able to see the forum

If the real ip is detectable then yes, its bannable.

Works great for me...thanks!

is it work on vb 4.0.7 ?