Replicating Dfs Root

Am trying to replicate my new dfs root to my other domain controller but keep having problems.when i get to the screen,Specify the dfs root share.When i specify the share,i get an error saying”Cannot create a file when that file halready exits”When i change the file,i still get the same problem.What should i do to enable the other domain controller replicate my dfs share for fault-tolarance purposes?