Ethereal help

-------------------
The Ethereal project is being continued at a new site.  Please go to
http://www.wireshark.org and subscribe to [email protected].
Don't forget to unsubscribe from this list at
http://www.ethereal.com/mailman/listinfo/ethereal-users
-------------------

Can give me some suggestion to make this program work.
I get theses errors..


The capture session could not be initiated (no devices found) /dev/ 
bpf0: Permission denied).
Please check to make sure you have sufficient permissions, and that  
you have the interface or pipe selected.

Also I seem to have issues telling me a folder does not exist when I  
try to capture to a location..

Thanks for any help..
Jeff