Key pressing definition in map or menu - not working when sourcing a .vim file

I implemented a function in /home/ioana/myfunction.vim, and, at the beginning of this file, I also added:

map <c-a><c-h> :Afunction

menu &Edit.Add\ function :Afunction<cr>

Both definitions are working fine when executing with my user (solaris and linux, vim 7.2). The problem appears when a colleague is opening gvim from his console, does :so /home/ioana/myfunction.vim and then tries to execute any map or menu which contains key pressing definitions - none of them is recognized as keys. The problem appears both in linux or solaris. Any other menu which does not contain keys ar开发者_开发技巧e working fine.

Please help to identify the cause of key pressing recognition, as I need the file to be used by several colleagues. Thank you in advance for your help.

Perhaps he has : remapped? Have you tried a non-recursive mapping?

noremap <c-a><c-h> :Afunction