The connection to the server was reset?

It might be your page is taking too much time to load. It is throwing connection was reset.
o you can increase time out and maxrequestlength property in web.config file. 
 
   
       maxRequestLength="2000000000" executionTimeout="999999"/>
   
Secondly check why your page is taking too much time to load. 
Just put a debugger in page_load and see which part of your code taking time.