I am having diffculties in loading my app using emulator in ai Starter app

I created a project in the MIT app inventor and connected using emulator. It worked fine in my home PC with the aiStarter but when I load the same project at my classroom, I ma getting an error. I am not able to see my project when the emulator is running!
I get an error in my aistarter cmd "Errno - 10053 - an established connection was aborted by the software in your host machine"
Any clue?