Website works on my local web server, but not on the product

Question

 Hello ,

 

I am working on asp.net , I have uploaded dll and some .aspx   page on production server 

but it's not working and same dll and .aspx page working on my Local machine as well as Test Server.

 

I have kept .dll in bin folder and  .aspx   pages out side of bin folder.

 loging  error is showing.

 

whenever i enter  user name and password its showing Application Error accrued  but on local machine  and test  server its working fine .

please tell me what is exact error where i am going wrong.