Key mapping not working in Insert mode of vim

Hi,

I put the below key mappings in my ~/.vimrc file

:nmap <F6> :w<CR>:!ruby %<CR>
:imap <F6> :w<CR>:!ruby %<CR>

The mapping is working in *normal* mode, but not in *insert* mode. Can any one
help me to fix it. When I am pressing *F6* in *insert* mode, it is printing the
command itself in my program file as below :-

require 'csv'

p CSV.read("#{__dir__}/test.txt", 'rb', :col_sep => ':'a)
:w # <~~~ see this
:!ruby % # <~~~ see this

The above 2 are coming when I pressed *F6* in *insert* mode.


--
================
Regards,
Arup Rakshit
================
Debugging is twice as hard as writing the code in the first place. Therefore,
if you write the code as cleverly as possible, you are, by definition, not
smart enough to debug it.

--Brian Kernighan

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