Added the dll from the bin directory to the IDE, dropped your control on an .aspx page and went to view it in the browser and get this message:

Access to the path "c:\inetpub\wwwroot\myccms\CuteEditor_Files" is denied.

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.UnauthorizedAccessException: Access to the path "c:\inetpub\wwwroot\myccms\CuteEditor_Files" is denied.

ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via <identity impersonate="true"/>, the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user.

To grant ASP.NET write access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access.

Source Error:

[UnauthorizedAccessException: Access to the path "c:\inetpub\wwwroot\myccms\CuteEditor_Files" is denied.]
   System.IO.__Error.WinIOError(Int32 errorCode, String str) +393
   System.IO.Directory.InternalCreateDirectory(String fullPath, String path) +632
   System.IO.Directory.CreateDirectory(String path) +195
   CuteEditor.Editor.resourcedFile(String directory, String fileName) +220

[FileNotFoundException: The file couldn't be accessed. This may be a security problem.]
   CuteEditor.Editor.resourcedFile(String directory, String fileName) +464
   CuteEditor.Editor.LoadIncludeFiles() +37
   CuteEditor.Editor.OnPreRender(EventArgs e) +33
   System.Web.UI.Control.PreRenderRecursiveInternal()
   System.Web.UI.Control.PreRenderRecursiveInternal()
   System.Web.UI.Control.PreRenderRecursiveInternal()
   System.Web.UI.Page.ProcessRequestMain()

Why?