I was tweaking my Ubuntu fstab and I messed up.

I am using Knoppix 4.0.2 CD, in a terminal I entered this: Sudo mcedit /dev/hdb6/ect/fstab

I was able to edit my fstab but when I tried to save it I could not using F2 or the drop down menu.
What am I missing, does anyone know what I may be doing wrong ? This is my work computer and I would be forever grateful if someone could help me please......

sarah