what am I supposed to do???
Click the [OK] button on that dialog.
Beyond that, providing some additional information to the folks on the forum who might be able to help you would be good... What OS, What version of Photoshop (e.g., 13.0.0, 13.0.1, etc.), what size and bit depth document, and maybe even some screenshots showing your desktop at the moment of the error.
Few folks here are mind readers (though I have my suspicions about Conroy).