Import EPS Codes into Another P6 Schedule?

I normally work in a P6 R8.3 database, hosted by a PM company through a remote connection.  I have one project schedule located on our general contractor's P6 database R15.1 that I access by remote connection.  My activity codes are all EPS codes on the 15.1 database due to access controls in our general contractor's database.  When I export my data from the 15.1 database and import it into my 8.3 database via an .xer file, the EPS codes do not import, but the global codes and values do import.  I tried different setting in the import template for the