Thank you for your answer Dizzi. Now I understand my situation..tho I didnt notice the Dragon's boobies getting bigger....lol!
I did go and load the V3 figure and tried the INJ again to her body..and yes this time it works!! So..problem solved. My question is..what if I have more than 1 V3 character in a scene. Does this mean that only the 1st V3 will be able to receive INJs?