Transactional Replication for MS SQL Server 7.0

Hi, Has anybody worked with the Transactional Replication (with Immediate Updating Subscribers) for MS SQL Server 7.0? We are using Navision Financials W1 2.60B, and two servers in a LAN. One server is the Distributor and Publisher, the other server is the Subscriber. We had some problems during set-up, e.g. invalid table- and fieldnames, but we solved most of them. Now we have difficulties when we change the Navision-database design (using Navision as front-end) when replication is active: when a table is changed and we try to save it, a Navision/SQL error occurs and tells that there were problems modifying the design in the replicated table. Any ideas? Thanks, Bart Bolkestein