I have experienced this problem with many of a Linksys router and the problem is easily fixable. Usually a firmware upgrade offered from the Linksys website fixes this particular issue. Linksys website, http://homesupport.cisco.com/en-us/support
How to upgrade the firmware on your Linksys router...
1. Log into your router configuration and see what version your firmware is.
2. Go to the Linksys website or use the link above and choose get linksys support.
3. Next choose your specific device from their list of devices or enter it in.
4. Choose downloads and then choose which firmware version you are currently using.
5. If an update is available, download it to your computer into a location you will be able to find it in.
6. In your Routers configuration, choose to udate the firmware,here you will choose where on your computer the update is located, and then choose update.
The update will usually take a minute or two to complete and finished.