liveuser and sessions

Hello, I test liveuser since some during and am very satisfied with the framework. The instalation was, also thanks to the good example, simple. At the sessionverwaltung I am awake now problems pushed. As soon as I attempt the session dates in a DB to save (z.B. PEAR::SESSION) I get a php-error. I think that the function - freeze() - unfreeze() for the redeem of this problems needs, however, I do not know where and how these functions are supposed to be used. perhaps there is already example as these functions are to be used? To thanks in advance. Niels Meyer info@nime-webdesign.de