black screen when trying to update to 2.1 eris

[gypsy76#AC]

Hello having great difficulty getting 2.1 on my eris keep following the different sites to the t. Im able to get it on my phones sd then shutting off end ( bottom right buton) and the volume down some stuff loads and read to push the track ball and then receive a black screen with a triangle and cell phone icon does anyone know what Im doing wrong? Had instant success with the early update the moto droid but not with this little phone please pm me any help will appreciated