Need help with wipers

[railmaster]

Hi there, I have just started making few test models before i decide to make any serious modes and so far i have been successful to manage to make things work with help of Dev Docs,TS forums and basically blogs by other devs as well. I am trying to add 4 individual wipers to my test model so that they can work independent to one another. I can get the wipers to work if i animate them at the same time but i can't just get it to work independently. I tried to search for blogs or other posts but couldn't find anything helpful regarding this. I have animated 4 individual wipers with their respective switches. In the "Anim set" 4 entires have been made namely wiper1, wiper2, 3 and 4. In the control section i have made 4 different control values for each wiper with "Exterior animation", "Interior geometry slave output" and "push button" for the wiper switch and lastly in made 2 "Wiper Pairs" for the 4 wipers and entered the corresponding textures in the texture ID. Inside the game when the wiper button is flicked it animates the exterior wiper but the interior wiper does not work and the rain drops never fall inside the wipers wipe area. Could someone please give some guide to fix this, i am not sure if this requires any scripting but in case it does i do not have enough knowledge to come up with my own. Thank you.