Lost Actvity Codes

Can anyone tell me why I lose my Activity codes if I copy a project ?

I note that this is one of the options presented when copying but despite checking the box my activity codes don't copy into the new project.

The workaround I have been using is to use Global change to take the codes into a text field then copy. Then I have to remove the group and sort in the new project , sort by the text field and then copy one code at the top of each group followed by the fill down for each code.

Cannot be a very smart way of doing it but I cannot understand why the codes are not coming across ?

Any help would be appreciated.

Ronnie.