I have had for nearly 1 year a TP-Link W8960N router/modem and have on the whole had no problems with it.
My setup entails using it as ADSL for VOIP for a Linksys PAP2T via World Exchange. Have also plugged the old Linksys modem router into the back of the TP-Link with DHCP disabled to allow a separate access point that I can unplug should my teenagers not switch off wireless devices when they are supposed to.
This was great as then still kept my TP-Link going as needed it for the VOIP phone connection.

Recently I found that I could see the wireless SSID for the TP-Link but it would not connect and since the older firmware did not support SIP ALG in the graphical setup I upgraded the firmware to the latest on the TP-Link website.

Today I noticed that my computer was connected to the Linksys and not the TP-Link so went to reconnect and could not find the TP-Link at all.
Logged onto the TP-Link router and had no SSID or wireless setup in the setup. It was there a week ago.
So went to reset up the wireless settings and the setup will not allow me to save the SSID and thus won't allow wireless to be enabled. Tried a few times and still no wireless setup.

Has anyone else had this problem?
What factors could affect the router to do this?

Cannot as easily reset the router to factory as then have to re-setup my VOIP settings for the PAP2T.

any help appreciated. I can still logon to the interent through the attached wireless Linksys modem router through back of the TP-Link but would like to be able to use both as wireless access points.

Andrew