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DLPDLCR3010EVM-G2: update flash image problem -can not replace the default splash image

Part Number: DLPDLCR3010EVM-G2

hi,please help 

i want to replace the default splash images  and  i proceed as follows:

down load the 3010 G2 firmware 7.3.3

update flash image  by DLP LightCrafter Display v7.4 

splash image  updated ( four images created by myself )

creat a new img fiel 

update the new img fiel 

when the updating finished,the projector show a chessboard ,

check the pattern and images tab in the gui software  the splash image dose not update