Sometimes I have the same problem. Looks like it has to do with "other" WiFi-access points in the area and the 9800i connects to those and even obtain an IP-adress from them. In my area, there are two other access points nearby. The only (fast) way I know to get it re-connected to my WiFi-point is using the off-on switch... Going to the network setup and change things there doesn't get the job done in most cases. Great, huh?