[rules-users] Serialize RuleBase ClassNotFoundException error.

Hi All, I have a RuleBase I use it create a working memory, I add some object to the working memory, I execute the rules I get some results I serialize both the working memory and the rule base I need the working memory So, I try to desirialize the RuleBase When trying to do so, I get the following error: java.lang.ClassNotFoundException: No ClassLoaders found for: com.oss.activation.rules.core.types.clientorder.ServiceOrderShadowProxy com.oss.activation.rules.core.types.clientorder.ServiceOrder is one of the objects i added to the working memory I also tryed create the working memory with the keepReference option set to false but got the same error.... Any knows what could be wrong here? Thanks! Pedro.