magento add session messages to cms page

In my Magento site I have a custom signup form and a CMS thank-you page that the user is redirected to after they complete the form. Is there a way to include the session messages in the CMS page?

I've tried playing w/ the Layout Update XML field, but I'm not getting anywhere

Here is what I've tried so far, all w/ no luck.

<block type="core/messages" name="global_messages" as="gloabl_messages" />
<block type="core/messages"  name="messages" as="global_messages" />

{{block type="core/messages" name="global_messages" as="gloabl_messages" }}
{{block type="core/messages"开发者_开发问答  name="messages" as="global_messages" }}

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Try:

<block type="core/messages" name="global_messages" as="global_messages"/>
<block type="core/messages" name="messages" as="messages"/>

That should display any messages in the core/session class. Make sure the messages are being set on the core session. It is possible they are being set on the customer session. Mage::getSingleton('core/session') gets the core session. Mage::getSingleton('customer/session') gets the customer session, etc.