Site only shows login page

I have a wholesale site that customers have to log in to before browsing. One day it just stopped allowing people to log in. When you type your info in the log in box it just refreshes the page and doesnt log you in.

I went in the admin and changed it so you didnt have to log in to browse but it still only shows the login page.

I have Zen Cart 1.3.8a. And I have done a few different add ons.

Any ideas on what do to would be great....

http://wholesale.grunionfabrication.com

One day it just stopped allowing people to log in
The code is not smart nor does it change by itself.
Compare your current code to your backup files from a date where it did function

Thanks for the helpful reply. I always thought code changed on its own....

I dont know when it stopped working because it was months ago and I had not made any changes around the time it stopped working that I can recall. It was at a time when I didnt have time to work on it. I really dont know what to look for in my code to figure out whats wrong. I was hoping someone might have an idea what could cause this or what to look for.

Use you FTP client and browse the file dates looking for those that are around the date of failure

I used WS_FTP to look at the dates of the files and the last changes I see were done on 8/16/08 and I backup up my database back to then and it still didnt work. So I have to figure out what file would cause that problem....
I could have sworn that it started acting funny where it would log you in only sometimes and not others then stopped completely....
:frusty:

You unfortunately modified the classic template directly and did not make it one by your own name....So you can not just overload the 1.3.8a files as you will loose all of your customizations..
As no one can use it as is this may be what you end up having to do...
You should review the tutorials on template and overrides and do it this way so you do not have a repeat.

Also you should learn from this to maintain a current backup of your files and if an active shop a daily backup of you database

If I am understanding what your saying.... is that if I had set up my site correctly using the override system and my own template I could just replace the stock files and see if that fixes it?

I could back up the site as it is now and replace the files on the server with clean ones and only install the important add ons....

Thanks.