Fix my internet issue via teamviewer

Hello. I have this website that i access all the time called hayneedle.com. Recently i can visit the website but i cannot go to it's check out page. The problem is from my computer as when i use another computer with another internet connection, i am able to go to the check out page. I have contacted my internet service provider and they told me that everything is fine on their end. I dont know if this is a proxy setting or any kind of setting on my browser that is preventing me to go to the check out page but i need to be able to access the check out page for hayneedle from my computer in order to make purchases. This job should be easy for someone who is experience