how to use COM Components from windows service

Question

I have a windows service which launches one application. this application has some COM component provided which can be used to perform different operations on the application. by using these COM components one can Login into application, Create new Patient, Select Patient, select Test etc. All these COM Methods working fine with Console Application. but when i try doing the same thing with windows service it is not working. I am able to launch the application by making it interactive but still COM component are not working. when i looked into the application i noticed that Patient is getting added to the application but the process is not visible. it does not login and selects the patient. Is there any way I can achieve this. please help!!