there can be several things
could be no permissions
could be no remote access
could be serevr service not started
could be worng username and pasword
could be that the user name or password have been changed
one by one..
check if the service is statrted first of all
from the SQL Server configuration manager
then check if he can log into the server from managem,ent studio
then check if there is connectivity from teh asp.net application machine to the SQL server machine
there can be several things
could be no permissions
could be no remote access
could be serevr service not started
could be worng username and pasword
could be that the user name or password have been changed
one by one..
check if the service is statrted first of all
from the SQL Server configuration manager
then check if he can log into the server from managem,ent studio
then check if there is connectivity from teh asp.net application machine to the SQL server machine