ip issues with arduino uno w/ ethernet shield

hope somebody helps me with this..

im working with a project, and have issues with networking.. i use tp link router that connected to my ethernet shield and with arduino.. i know that the mac, ip address reserve is ok and i can ping it but the issue is when i browse the ip address it always says connection timed out.. sometimes my code works, and being browsed but sometimes it always have an error... can i use static ip for this?

What code are you using?