I don't understand exactly why the directory you typed in your autoexec part of your config file is showing "mount C C:\DOS\CDrive". Make sure this is the right directory, because I have a feeling from what you are saying that it should be "mount c c:\dos" instead.
If you don't have a c:\dos\cdrive directory, DOSBox will take that as an error and won't mount the C: you are asking. Logical followup is that the next commands hold no sense in themselves since they need that drive to be created (mounted) before being able to execute themselves correctly.
Let me know if this help you.
