HMC ip change , no data

Hi,

i had to change a HMC ip address , i have recreated configuration in the IBM Power Systems configuration

HMC REST API test connection is successfull , 

but i have error message when executing load_hmc_rest_api.sh so no data in dashboard

Rest API  :  Cannot get session!!
! Error : 401 : PMCSS007: The authorization filter did not detect a valid session.  Access has been denied. Check the allow remote access via the web setting in the console user properties, or check the request for a valid session id.
! No Current Session
! HMC xxxxxxx will not be shown in data.

thanks,