Text editors

hi pals...
i am working with moodle 1.4 on linux fedora core 3.
i am working on mozilla,when i try do cut copy paste it show an error.
"For more information HOW TO enable Cut/Copy/Paste see moodle -discussion"
but in this dicsussion i didnot find any satisfactory result...
so please help me..
any help will be highly accepted..
regards
Raju