[TYPO3-dev] Session troubles

[Sebastiaan van Parijs]

Hey guys,

Im using the usuall Session codes to store an retreave the Session Data 
Array, with:

$sessionData = $GLOBALS['TSFE']->fe_user->getKey( "ses","Data" );

$GLOBALS['TSFE']->fe_user->setKey( "ses","Data", $sessionData );

$sessionData = $GLOBALS['TSFE']->fe_user->getKey( "ses","Data" );

print_r( $sessionData );

For some strange reason the session isnt being stored, but outputted 
correctly, i dont know if this has anything to do with the fact im using
a XAJAX function to store the data, any suggestions on what im doing 
wrong? Might be an rookie mistake i dont know, never combined the 2 before.

Please help me out!

Sebastiaan