There are separate newsgroups set up for the Office line of products, I
suggest you post yours in the Access General Discussion, Macro or
Programming, depending on what you mean by "my program". Also, you should
contemplate adding some more information to your post.
You might have already gotten your answer from the Access newsgroup, but
Access 2003 should still work. They are different applications with only
moderate linkages, which still exist. There may be some issues that may have
to be worked through in porting data from an Office 2007 file (Excel or Word
for instance) but overall they should work together. I ran Outlook 2003 with
my Office Home and Teacher addition for several months without any issues,
but, of course, there is no data porting done...only document attachments
(which worked without a flaw BTW using the send command from Word).