[Other] changing bike intro problem in emerald?

[shadow300]

so I just changed the intro bike with my my sprites...
i've done this with the girl (May riding bicycle) part and it work.
so, I continue with changing the boy (Brendan riding bicycle) part.
after iI write the rom the error message
"COMPRESSED 0X774 too big"
so, after i read some tutorial, the way to solve this problem is by changing the offset.
after I click write to rom, it looks like it work.
but after I click the previous/next button and back to "Brendan riding bicycle" sprite, it didnt change.
What should I do to fix this problem?
btw I use pokemon emerald rom...

Sorry for my bad english. I hope you can understand it.

 

[esperance]

When you use a program for image editing and you enter a new image offset there should be an option saying something like "Automatically Repoint", which you need to have checked for the pointers to the old image to be changed to point to the new offset. This is because instead of replacing the old image, you're now inserting a new image that the game won't know is there unless you tell it that it is.