FTP Synchronise .txt Files

FTP sync text files. I have the FTP app written and sync function written. However it is not working quite right. Text files are uploaded to server - and synched with files there.? Then? text files are downloaded to Main PC from server and synched with data on Main PC.? So final data on Main PS is complete.? I need my current SYNC function to work properly. Code in VB6. Works with all Windows OS. REMOTE -->>? FTP SERVER? -->> TO MAIN PC