So, I had this too and this is what worked for me...
Click on SETTINGS - Wi-Fi - click on your current wifi connection and click "forget this network".
Check to make sure your DNS settings aren't saved from an old service you used to use (my case). If they are, erase them so when you reconnect to the wifi they will be replaced by the default settings (make sure to do this for both bands is you have a dual band router).
Once you connect to your wifi again and fire up the Netflix app on your ipad...BAM...no problems.
Hope this works for you!