Command Error: Invalid Directory

Ok I need help with running Panda3D through the command prompt. I do everything the tutorial tells me to do but when I input:

cd C:\Panda3D-1.5.0\mystuff

it says

invalid directory. Can someone tell me why it says that when the directory is perfectly fine?

Are you sure there are no spaces in your path? If there are, please insert the path in double-quotes, " "'s.