Problem connecting to my Technomate TM-600

It was working OK..

I haven't reset anything but I cannot FTP or connect to the box via the IP address assigned by the router's DHCP.

1. I have checked the patch lead (CAT 5 Ethernet cable) which works seamlessly from the router to my laptop.
2. Check both ports at the back of the box and router. Both Ethernet ports are lit up.
3. Box is assigned by a local IP of 192.168.0.7.
4. It's receiving a static IP address too (Internet).

Yet I cannot FTP or access box interface via browser (Firefox) using the box IP address (192.168.0.7).

I was able to FTP with root as username and a blank password and access control panel of the box via Firefox using 192.168.0.7.

Turned off/on router, rebooted box few times, but to no avail. What's wrong?