How To Solve Connection Reset By Peer Error

I am using a program for the daily calculation of taxes and record input/output of products and upload the data on the server through FTP so that it’ll be easy for our clients to monitor the work process. But suddenly I get “Connection reset by peer” errors way too often. I can’t configure and change the connection. Please help me to get over this issue. The file is not uploading to the server, and in return, clients are submitting the complaints regarding this. Please help asap.

