Problem using DC7 API -- data is not being migrated properly

Alright, so I have a simple program where the user inputs 3 items: a servername, the name of the "model" database, and the name of a new database (to be created and modeled after "model" database).

What I don't understand is that 2 months ago, my program worked fine: the new database was created, the structure was transferred using the SQL Compare 7 API, and then the data was transferred using the SQL Data Compare 7 API. Now all of a sudden I reopen the project to find that only the structure is transferred, but not the data? It is possible that I modified my code and broke the program before leaving it 2 months ago, but I would hope not. Below is a snippet of what I've been using:

public static bool CreateNewDB(string serverName, string database, string modelServer, string modelDatabase) {
            Microsoft.SqlServer.Management.Smo.Server _server = new Microsoft.SqlServer.Management.Smo.Server(serverName);
            Microsoft.SqlServer.Management.Smo.Database _db = new Microsoft.SqlServer.Management.Smo.Database(_server, database);
            _db.Create();

            try {
                RedGate.SQLCompare.Engine.Database db1 = new RedGate.SQLCompare.Engine.Database();
                RedGate.SQLCompare.Engine.Database db2 = new RedGate.SQLCompare.Engine.Database();

                db1.Register(new ConnectionProperties(modelServer, modelDatabase), Options.Default);
                db1.RegisterForDataCompare(new ConnectionProperties(modelServer, modelDatabase), Options.Default);
                db2.Register(new ConnectionProperties(serverName, database), Options.Default);
                db2.RegisterForDataCompare(new ConnectionProperties(serverName, database), Options.Default);


                Differences stagingVsProduction = db1.CompareWith(db2, Options.Default);

                foreach (Difference diff in stagingVsProduction) {
                    diff.Selected = true;
                }

                Work work = new Work();
                work.BuildFromDifferences(stagingVsProduction, Options.Default, true);

                ExecutionBlock block = work.ExecutionBlock;

                BlockExecutor executor = new BlockExecutor();
                executor.ExecuteBlock(block, serverName, database);

                
                SchemaMappings mappings = new SchemaMappings();
                mappings.CreateMappings(db1, db2);

                ComparisonSession session = new ComparisonSession();
                session.CompareDatabases(db1, db2, mappings);

                SqlProvider provider = new SqlProvider();
                ExecutionBlock block2 = provider.GetMigrationSQL(session, true);

                BlockExecutor executer2 = new BlockExecutor();
                executer2.ExecuteBlock(block2, serverName, database);
                

                db1.Dispose();
                db2.Dispose();
                block.Dispose();
                block2.Dispose();
                session.Dispose();
            }
            catch (Exception ex) {
                Business.FileTool.Append(@"C:\redgatelog.txt", ex.ToString(), "");
                return false;
            }
            return true;
        }

The code is called via:
if (Business.Database.CreateNewDB("localhost", "TestDB1", "localhost", "MyTemplateDB"))
// do something

In my catch, I append the exception thrown to the file "redgatelog.txt"... yet there has never been a modification to this file, and the function CreateNewDB always returns true... which makes me believe that the DataCompare ran successfully, but for some reason didn't (maybe bad SQL generated?).

I have my licenses.licx file set up correctly.