You may need to flash your dns files. Press Win key + R to bring run command; then,
In the Run text box, type: ipconfig /flushdns
Press Enter or Return, and your cache will be flushed.
It will be better if you can provide Server details. What is/are the platform(s) used to build them?
"Wiki" is not good example to me, as the word itself has a different significance; You want to say, if you typed "Example" and pressed enter it followed the right URI path; right?
Please mention the previous OS too.