CreateDevice problem

I have the following code in my app: COleDateTime l((time_t)0); m_hRetCode = m_opIDirect3D7->CreateDevice(...); l=COleDateTime((time_t)0); and for some unknown bizar reason, after the creation of the device the value of l changes. Does anyone have a clue? COleDateTime l((time_t)0) = 25569.083333333 l=COleDateTime((time_t)0) = 25569.083984375