SLC Preprocessing

Hello I am working with SLC product
S1B_IW_SLC__1SDV_20170804T152012_20170804T152040_006792_00BF31_189D
S1B_IW_SLC__1SDV_20170804T151947_20170804T152014_006792_00BF31_6038
while preprocessing with the images separately it is fine but when performing the geocoding process i can only view the master image while the slave remains dimmed and after the back geocoding for the rest of the preprocessing steps i cannot view the image there is an image but a dimmed one


and this is the video i am following

Could you please tell me where i am going wrong ?
Thank You