Errors in folders after replicating R6 mailfile with R5 mailfile

Hi,I updated our external mailserver from 5.0.12 to 6.5. On this server there are replicas of maildatabases from our internal server to view them on the web.

I changed the design template of one maildatabase to R6 Web Access template and replicated it with the database on the other R5 server. Now I get errors in every self created folder in the R5 database when opened in R5 and R6 client, although I disabled replicating design elements.

Error is:

Not a sub or function name: UICOPYINTONEWDOCUMENT

Maildatabase on R6 server has no errors in folders.

How can I solve this problem?

Thanks!

Rainer