Help creating custom report and debugging blank page

Question

I'm trying to create a custom report using the guide here...

Creating new completely custom report

I created it EXACTLY as described. The new report shows up in the dropdown for Reports as it should, but I only get a blank page (besides the header and footer). Even if there wasn't any data for the report, I think I should still get a empty grid.

I added logging to all the functions in all the files under Block directory, but nothing is getting logged. Example, in Mycompany_Mymodule_Block_Adminhtml_Mymodule_Grid

public function __construct() {
 Mage::log("construct()", null, 'Mymodule.log');
 parent::__construct();
 $this->setId('mymoduleGrid');
 $this->setDefaultSort('created_at');
 $this->setDefaultDir('ASC');
 $this->setSaveParametersInSession(true);
 $this->setSubReportSize(false);
}

Not sure where to go to even begin debugging this.

Answer 1

Found my problem and it was me being stupid. Thought I had all cache turned off, but Blocks HTML output was still enabled. Flushed Magento Cache and everything started working.