Can anyone tell me if there is a difference in the code between 2003 and 2007 when doing the following

I have a word doc file that has vba code and it only runs the code.
During the execution of the code the code opens a different document edits it and saves it.
then it continues to execute the code until it has to open and edit another document .

The code I have works for word 2003 and excution continues normally

However in 2007 the code fails after editing and saving the document because it cannot find the original code so it fails to open the next vba form

So what is the code to open, edit and save a file and continue the original code where it left off

The references are as they should be in each of 2003 and 2007