select * from WebServers

update WebServers
set [Enabled] = 1

Should 1 server be enabled or all?

Following is necessary when moving dnn 5x website to another hosting provider or to another webserver..

-- delete all records
TRUNCATE table {databaseOwner}{ObjectQualifier}WebServers
go

from Host Settings click on Restart Application.
This will populate WebServers table. (but will not enable running webserver)

-- enable webservers
UPDATE {databaseOwner}{ObjectQualifier}WebServers SET Enabled = '1'
go

from Host Settings click on Restart Application.

Additionally from host settings, set "scheduler mode" to timer method and "compression setting" to deflate compression and uncheck Use whitespace filter then update and restart application. timer mode is for performance and stabilite. whitespace filter is not necessary when using deflate compression. after applying these settings click on restart application. also clear event viewer logs and check logs next business day ;-)