Post does not work when HTTPS

[eluser]Jorgeska[/eluser]
If I use HTTP the form sends back the post values successfuly, but if I setup apache to force SSL it doesn't take back any data.

Profiler says:

No POST data exists

And I get nothing in:

Code:

echo '>'.$this->input->post('text').'<';

What should I do to make forms work with HTTPS?
Any idea?