Uncle cheese I have changed page with no luck nothing is happening with regards to sorting the datasheets I have into categories.

Here is the code may help??

All the objects are working fine just no Category sorting or title.

----------------
ResourcePage.php
---------------

class ResourcePage extends Page
{
static $has_many = array (
'Resources' => 'Resource'
);

public function getCMSFields()
{
$f = parent::getCMSFields();
$manager = new FileDataObjectManager(
$this, // Controller
'Resources', // Source name
'Resource', // Source class
'Attachment', // File name on DataObject
array(
'Name' => 'Name',
'Description' => 'Description',
'Category' => 'Category'
), // Headings
'getCMSFields_forPopup' // Detail fields (function name or FieldSet object)
// Filter clause
// Sort clause
// Join clause
);

$manager->setFilter(
'Category', // Name of field to filter
'Filter by Category', // Label for filter
singleton('Resource')->dbObject('Category')->enumValues() // Map for filter (could be $dataObject->toDropdownMap(), e.g.)
);

// If undefined, all types are allowed. Pass with or without a leading "."
$manager->setAllowedFileTypes(array('pdf','doc'));

// Label for the upload button in the popup
$manager->setBrowseButtonText("Upload (PDF or DOC only)");

// In grid view, what field will appear underneath the icon. If left out, it defaults to the file title.
$manager->setGridLabelField('Name');

// Plural form of the objects being managed. Used on the "Add" button.
// If left out, this defaults to [MyObjectName]s
$manager->setPluralTitle('Resources');

$f->addFieldToTab("Root.Content.Resources", $manager);

return $f;
}

function MyFileObjects()
{
$filter = Director::urlParam('Action');
return $filter ? $this->Resources("Category = '$filter'") : $this->Resources();
}

}
class ResourcePage_Controller extends Page_Controller

{
function category()
{
$resources = DataObject::get("Resource","Category='".$this->urlParams['ID']."'");
if($resources) {
return $this->customise(array(
'Resources' => $resources,
'CategoryTitle' => $this->urlParams['ID']
));
}
return false;
}
}

-----------------
Resource.php
----------------

class Resource extends DataObject
{
   static $db = array (
      'Name' => 'Text',
      'Description' => 'Text',
      'Category' => "Enum('CSO Storage Solutions, Storm Water Storage Solutions, Highways Applications, Surface Water & Sewage Pipelines, Water Treatment Works, Drinking Water, Renewable Energy, ATS Applications, Litespeed Applications')"
   );
   
   static $has_one = array (
      'Attachment' => 'File',
      'ResourcePage' => 'ResourcePage'
   
   );
   
   public function getCMSFields_forPopup()
   {
      return new FieldSet(
         new TextField('Name'),
         new TextareaField('Description'),
         new DropdownField('Category','Category', singleton('Resource')->dbObject('Category')->enumValues()),
         new FileIFrameField('Attachment')
      );
   }
}

--------------
ResourcePage.ss
--------------

<% if Resources %>
<% control Resources %> $CategoryTitle
<ul>

<li><a href="$Attachment.URL">$Name</a><br>$Description</li>

</ul>

   <% end_control %>
<% end_if %>

As long as you have EmployeePage extends Page in EmployeePage.php in your code folder, and you run a /dev/build, you should get the choice in your create dropdown menu.

Where's your code for the Employee object?

You haven't passed a function name into the DOM, so it's assuming "getCMSFields()" as your popup method. Change:

public function getCMSFields_forPopup()

to

public function getCMSFields()