SBuilder questions

I've been trying the new FSX version of SBuilder and ran into some problems creating an island. Here's what I've done so far.1. Created an "exclude all terrain" polygon that straddles two Hydro polygons and two other "exclude shorelines" polygons for the default shorelines in each grid. (SUCCESSFUL)2. Traced my island with FSKML and imported it into sbuilder through the import shape command (SUCCESSFUL)3. Created a hydro polygon around the area my island is located and used the imported polygon from (2) to punch a whole through it. (SUCCESSFUL)4. Created roads with the line tool (SUCCESSFUL)5. Created shorlines with line tool. These are really just beaches so they're separate lines just off the boundary of the island's polygon. (UNSUCCESSFUL)6. Created a new hydro polygon slightly larger than the two excluded grids. (UNSUCCESSFUL)The result in FSX is that I can see my island with the roads, but no shorelines and no water.What am I doing wrong?