I'm having a problem setting user permissions.

I'm building a site that has the main site and a secondary site with it.

The secondary site is for training purposes only and its all hosted on a server here at work.

Basically I'm trying to restrict access to the primary site except for browse node so that users learning umbraco don't ruin the content.

I set the user permissions for the top node, select apply to children and save. The save bar just stays forever.

tried this on a single item as well with no children, same error. tried different permissions, same error.

I checked the event viewer for it and come to find out i've been throwing errors from tinyMCE for a week.

Note sure if they are related, but its all I have.
Any help would be appreciated.

Here is the error:

Event Type:    Warning
Event Source:    ASP.NET 4.0.30319.0
Event Category:    Web Event
Event ID:    1309
Date:        6/20/2013
Time:        12:24:53 PM
User:        N/A
Computer:    STLMOPULSDEV01
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 6/20/2013 12:24:53 PM
Event time (UTC): 6/20/2013 5:24:53 PM
Event ID: 210e303b507c41309b974fff8e00a6de
Event sequence: 286
Event occurrence: 2
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/233591450/Root-1-130162193729270767
    Trust level: Full
    Application Virtual Path: /
    Application Path: C:\InternTestSite\
    Machine name: STLMOPULSDEV01
 
Process information:
    Process ID: 4288
    Process name: w3wp.exe
    Account name: NT AUTHORITY\NETWORK SERVICE
 
Exception information:
    Exception type: PlatformNotSupportedException
    Exception message: This operation requires IIS integrated pipeline mode.
   at System.Web.HttpResponse.get_Headers()
   at Umbraco.Web.UmbracoModule.<Init>b__a(Object sender, EventArgs args)
   at System.Web.HttpApplication.RaiseOnPreSendRequestHeaders()

 
 
Request information:
    Request URL: http://10.200.111.30/umbraco/plugins/tinymce3/tinymce3tinymceCompress.aspx?rnd=7903b115-d0f1-45ea-8c50-e8a6bf6ece10&module=gzipmodule&themes=umbraco&plugins=contextmenu,umbracoimg,paste,inlinepopups,table,spellchecker,advlink,umbracoembed,noneditable,umbracocss,umbracomacro,umbracopaste,umbracolink,umbracocontextmenu&languages=en
    Request path: /umbraco/plugins/tinymce3/tinymce3tinymceCompress.aspx
    User host address: 10.200.110.200
    User: 
    Is authenticated: False
    Authentication Type: 
    Thread account name: NT AUTHORITY\NETWORK SERVICE
 
Thread information:
    Thread ID: 9
    Thread account name: NT AUTHORITY\NETWORK SERVICE
    Is impersonating: False
    Stack trace:    at System.Web.HttpResponse.get_Headers()
   at Umbraco.Web.UmbracoModule.<Init>b__a(Object sender, EventArgs args)
   at System.Web.HttpApplication.RaiseOnPreSendRequestHeaders()
 
 
Custom event details:

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