Is your image a .fits file? (as described at your link)
I blinked an image by creating a sample .fits file here:
https://skyview.gsfc.nasa.gov/current/cgi/query.pl
Input 10 45 3.6, -59 41 4.2 to create a sample .fits file, save to Desktop (or any folder)
Open CdC
View > Position 10 45 04 -59 41 04, FOV = 00d 15m 00s, OK
Setup > Pictures
in Background tab, browse to .fits file on Desktop (or image folder)
check "Show this picture", Apply, OK
View > Blinking picture
Does this help?
- sutekh