Beginner Help with Wolfram Mathematica pl!

I write code at Mathematica 6 kernel; my OS is Vista.

When I write an input such that the output is supposed to be in graphics, (like plotting a graph, etc), it inevitably says: -Graphics- and just stops at that. What can I do that it displays graphics?

2nd question:

Also, I can't seem to work at .nb (notebook) when I boot Mathematica by clicking on the Mathematica icon in the start menu. It's when I boot Mathematica by clicking at the Mathematica 6 Kernel icon that I am able to give input. It says,

You are running in a mode which does not allow editing. Contact Wolfram Research (Wolfram Research--Makers of Mathematica; Leaders in Computation) about enabling additional capabilities.

Also, I ain't able to do anything when I go to Help>Internet connectivity... why is that so?

Thanks!