Error : Invalid SFAPI session! when connecting to Successfactors

Hi experts,

I am in a situation where I am getting this error : Invalid SFAPI session! when fetchiing data from SF.

I am running this interface for "Basic Employee Data", for which PI objects are come shipped and I used them in PI.

There are three com channels and SI interfaces  : 1 for login 2 for data transfer and 3 for logout, all make one interface.

Login channel runs and  creates a session id but its value is <sessionId>$Version=0;</sessionId>

I am not sure if $Version=0; is correct , what can I do???