Webpage automatically logs off

[Tdotohh]

I have the Samsung SGH-I547C on version 4.1.2. I use a website that needs to be logged into, after a while it will log-off and I will have to re-login. I think the phone was updated. Can anyone let me know how to fix this? Do I need to downgrade (help would be appricated), or is it a setting I need to fix.

Thanks!