Can't edit anything

Hey, I am really sorry if I have missed something incredibly simple but I have looked around and I can't figure my problem out.

Any time I try to do edit or move a file, I am prompted with an Access Denied message. I can't write any of my own files either. I'm using ComputerCraft within the Tekkit pack on SSP.

I hope you can help, I was looking forward to programming :)/>/>

Make sure your not trying to work on programs or create files in the /rom directory it is read only from within MC/CC.

You can also create/edit programs from outside of the game using something like notepad++ or gedit. The computer directories are located at %APPDATA%.minecraftsavesworldnamecomputercomputerid

Derp. The clue is in the name, Read Only Memory.

I feel like a fool. Thank you very much.