Connection Timeout Expired

Connection Timeout Expired

Message:Connection Timeout Expired. The timeout period elapsed during the
post-login phase. The connection could have timed out while waiting for
server to complete the login process and respond; Or it could have timed
out while attempting to create multiple active connections. The duration
spent while attempting to connect to this server was - [Pre-Login]
initialization=0; handshake=13063; [Login] initialization=16;
authentication=175; [Post-Login] complete=3546;
|DataAccess|ExecuteNonQuery
The client is SQL Server Management Studio 2008 R2. Firewall on the server
is turned on. I can telnet to port 433 & 80. And connecting from Studio on
the server itself works fine. Desktop and Server are on the same segment;
using Windows authentication.