Zen cart internet explorer Firefox issue

Hello, I need this quick job to be fixed on my zen cart website. I change the folder in which the cart is installed. Now, I am having issue log and process purchase as customer, in firefox and internet explorer. When I try to log using those two browsers, it does not let me log in. Sometimes, the page does not load, as if the page is slow. I will pay $15 for this quick fix. And any of my order project will be going to you if this is done. I need it now, as my customer are not able to log in and i am loosing the couple of sale I have a day. thanks