Your support has been very helpful and leaded me into the solution of my problem, I appreciate that.
Thanks again and hope everything goes cool for you.
First, do not worry about the mode, becuase whenever you boot your system, you are entering into Kerne mode, here the normal function keys will not function, for comming out of Kernel mode you please type go at the prompt, u will be either in C-shell (or) B-shell depending on ur native environment.
Second, you have to re-install ur Operating System once again. I am also working in SCO-Unix environment (Version is 5.0.4e Open server).