The Dink Network

I'm trying to add new graphics but I'm doing something wrong, not sure what.
Something works because in WDE the sequence numbers are open (ie selectable) but the sprites aren't there, it's just blue like the background. I've checked the file path and everything which is all fine. They're seq. numbers from 901-919, I thought that might be too high but I tried at a lower number and no difference.

The strange thing is that almost identical graphics do work.

INI lines (blue works):
load_sequence graphics\drflies\blue\dr1- 891 BLACK
load_sequence graphics\drflies\blue\dr2- 892 BLACK
load_sequence graphics\drflies\blue\dr3- 893 BLACK
load_sequence graphics\drflies\blue\dr4- 894 BLACK
load_sequence graphics\drflies\blue\dr6- 896 BLACK
load_sequence graphics\drflies\blue\dr7- 897 BLACK
load_sequence graphics\drflies\blue\dr8- 898 BLACK
load_sequence graphics\drflies\blue\dr9- 899 BLACK

load_sequence graphics\drflies\red\dr1- 901 BLACK
load_sequence graphics\drflies\red\dr2- 902 BLACK
load_sequence graphics\drflies\red\dr3- 903 BLACK
load_sequence graphics\drflies\red\dr4- 904 BLACK
load_sequence graphics\drflies\red\dr6- 906 BLACK
load_sequence graphics\drflies\red\dr7- 907 BLACK
load_sequence graphics\drflies\red\dr8- 908 BLACK
load_sequence graphics\drflies\red\dr9- 909 BLACK

load_sequence graphics\drflies\yellow\dr1- 911 BLACK
load_sequence graphics\drflies\yellow\dr2- 912 BLACK
load_sequence graphics\drflies\yellow\dr3- 913 BLACK
load_sequence graphics\drflies\yellow\dr4- 914 BLACK
load_sequence graphics\drflies\yellow\dr6- 916 BLACK
load_sequence graphics\drflies\yellow\dr7- 917 BLACK
load_sequence graphics\drflies\yellow\dr8- 918 BLACK
load_sequence graphics\drflies\yellow\dr9- 919 BLACK