Hi Adam,
 
I think there's a misunderstanding here.
 
The Skins matter is that the first error at all was on the particular line of CH_MainForm.aspx that creates the link to the Skins files. I hardcoded the link and began to receive the other error.
 
I want to start to troubleshoot this one first: When CH_MainForm.aspx, e.g:

//localhost/WAppDream/CuteSoft_Client/CuteChat/CH_MainForm.Aspx?Location=Lobby&LocationId=1
 
or
 
ResolveUrl("~/CuteSoft_Client/CuteChat/CH_MainForm.Aspx?Location=Lobby&LocationId=1
 
this exception occurs:
 
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:

line 39:   <..."stylesheet" href="<%="Skins/"+ CuteSoft.Chat.ChatWebUtility.SkinName + "/style.css"%>" id="skincsslink">
 
Source File: C:\Inetpub\wwwroot\WAppDream\CuteSoft_Client\CuteChat\CH_MainForm.Aspx    Line: 39
 
Maybe the origin of this error is related with the others.
 
Would you be needing a copy of my global.asax file to see if it's a problem with the interfaces implementation?
 
Thanks a lot