After Upgrade Admin Don't Work

[kongngau]

After upgrading the newest version of osCommerce, and fixed a lot of hassle such as PHP 5 files, etc. Then my web front face is OK as usual before, but I found out I can not log in to my Admin Page to update all my data in my website.

 

So how can I do that and let me back in business ??

 

Thanks and regards,