Gnome2.18.2+FreeBSD-6.2 , issue after six months

["kk CHN" <kkchn cdac gmail com>]

 I configured Gnome2.18.2 for my FreeBSD6.2 Box six months before
, its working fine upto the last week , suddenly  its behaving
strangely , its not launching the login shell from the panel ,


 so I went through application-->system tools-->new login  


But getting the  message (GDM is not running , you might be using
a different display manager such as KDM or xdm .If you still wish to
use this feature , either start GDM your self or ask your system admin
to start GDM.

I havn't altererd any system configuration , in
/etc/rc.conf   these lines are still there gdm_enable="YES"
gnome_enable="YES"  

some other problems also

I can't browse the internet (launching the FireFox web browser
itselftaking a long time ,the I tried to acess yahoo.com,google.co.in
..etc its not allowing me to surf the net , even in the browser I
configuerd for my proxy server and port )


Ifconfig command (after a long interval I am able to get a shell prompt ) returns me the ip address and mask of my  system

Ifanybody can help to find what wrong with this  box , and how to fix it please send me your suggestions asap

Thanks in advance
KK