Additional engine ip change

i have re ip'd my addional polling engine,

it is passing the information back to main server ok, but in admin/pollng engines  it is still listing the old ip,  thus when i try to do a "list resources" on a node on the aaddiotnal polling engine i get a error message, failing to talk to engine

i have done a config wizard on the additional polling engine and rebooted both boxes

any help appreciated