I used 44000000 - 02000000 address.
make sure db2020_52 boot script is selected before Enter the matrix. instead k750_w800_CID36 on the tut.
I tried Device:DCU-60 Speed:921600 Boot Script:db2020_52 and am having no luck... I can enter the matrix and get to the flash screen, but when I click on it I get that error message that I posted in the above post... Cannot get to the memory screen....