"The connection was reset" in Mozilla Firefox

i have the submit form with multiple file upload control(java script).when i will run the code is working well and showing me the form proper.i will fill the information properly and also file upload is working ok.but on clicking of Submit button the Mozilla shows me the "The connection was reset" exception.but if i was not upload any file by using the file upload then it never shows me any error.it save in database prope开发者_JAVA百科rly.

i cant understand the problem please anybody help me out. (sorry for English grammar).

thanks in advance.

Try running with a sniffer (e.g. wireshark) - the output will give you a good idea as to the reason