I have Ubuntu in my system from past two years. Previously I used to work on windows vista. There exspect is used to work properly on CMD. But now from two days I am working on exspect. It was working fine for two days but now it is not working properly. It is not allowing pseudo terminals to wrap up subprocesses transparently, and not allowing the automation of arbitrary applications that are accessed over a terminal. Please tell me what can I do to make it work correctly.