Double check the file permissions, sounds like the web server can't read them.  Also, if you have access to your error logs, check there for 404 errors on image (png, gif, or jpg)  Did you upload custom items?

I had have thesame problem with, IE (Windows), Firefox (MacOs, Windows), Opera (Linux, MacOs), Safari 2 (MacOs).
Server Apache version   1.3.37 (Unix), PHP version   4.4.4, MySQL version 4.1.22-standard, HCL 2.1.2.

I had cheked de permisions and the icons files are  chmodded 644, the icons folder is chmodded 777.

In the errors logs no there are 404 errors on image (png, gif, or jpg).
I uploaded custom icons and doesn't work.
I use the help center with this code

<a href="javascript:popUpchat('http://www.luciaw-adv.com.ar/hcl/live/main.php')" target="_blank"><img src="http://www.luciaw-adv.com.ar/hcl/icons/online.gif" alt="Haga clic aqu? para Consultas On-line" /></a>

and load icons and work the chat but doesn't work cobrowser, doesn't update the icon (on-line - off-line).....

This site was run in other server ok when moved to new server dosen't work.
I installed help center again  but I had have the same problem. 

Translated in google

It changes it so that chat while I solve the problem, with the generated code only works works chat and the monitoreo but does not load the icon. In the management system I do not see them either, nor those that come with the HCL, nor those that position I. To the HCL it had it installed in another server with he himself dominion and worked changes of server and I have east problem.

I am going to be connected within 8 hours again, she already tries to install it of again and she happens to me the same.

My native language is spanish.
I am trying the one of the anticipated ones again passing all to 777 to prove it
thanks, later I tell you that it happened

yes, send me the debug file and try it.

You do not forget to send the debug file

Tanks, Ready, the file is into HCL root folder.