This is curious... so I am assuming you are doing admin-deploy? It is always a bit tricky. Things I would check:
1. Has the form been correctly published (aka saved) before it got uploaded to SharePoint?
2. Check the SharePoint log, maybe there is something else happening and you're just getting a wrong error
3. It should not be required, but try to see if someone who is both Site Collection admin AND Farm admin could do that. I believe the converse is true: if you're a farm admin, you also have to be the site collection admin.
Hope you can figure your problem out!
Dave.
David Airapetyan / Software Services ArchitectQdabra® Software / Streamline data gathering to turn process into knowledge