If you are experiencing problems with MyRouter you should check if you have ICS (Internet Connection Sharing) enabled on the network card you wish to share your internet wirelessly. below is how to do that.
First you must open Control Panel -> Network and Sharing Center -> "Change adapter settings"
Once this is open right click on your network adapter you wish to enable ICS and click "Properties"
Go to the Sharing" tab on the window that pops up and check the first check box
After that click OK and test MyRouter again to see if the problem is fixed
The Sharing tab won't be available if you have only one network connection.