Queueitem worked by field is empty for the reply emails

Hi,

I need help in modifying a plugin for updating the queueitems workdby field.

The scenario is when i have an email activity, the queueitem  has worked by field value and when i reply to this email, the same workedby field value should be there in the reply email as well but in my case its empty.

Can anyone help me on this :)

Thanks ,

JB

to the vale