Command Line difficulties

Hello,

this is the first time I am using the command line for Maple.I have a few questions,

1. How do I change my current directory?

I tried with currentdir() but with no success.If my dir is E:\Work ,how do I change it?

2. How to execute a *.mpl?

I tried cmaple.exe <*.mpl> but again no success.

I am using Maple13 by the way.

Any help is golden.

Best regards