Service Desk Returning Blank Page

Hi,

Today I have a problem where nobody that uses the service desk can login. The service desk immediately returns a white page trying to access the main page (even when loading from locahost).

I had this issue before but removing the SESSIONID cookie solved it. Now each time I visit the SD this cookie gets created (indicating something is happening) but again, a pure white page is shown with no html. Its like the SD is having trouble somewhere and just returns nothing instead of an error.

We are using build 7506 and have restarted the SD machine, ttried multiple browsers (even browsers that don't support single sign on).

Here is an error / info seen in C:\AdventNet\ME\ServiceDesk\server\default\log\serverout0.txt after I try to log in to the sd.

[15:22:12:562]|[05-08-2009]|[com.adventnet.servicedesk.tools.AuthenticateNtlm]|[INFO]|[25]|: LOGGED USER in ntlm : null|
[15:22:12:562]|[05-08-2009]|[com.adventnet.servicedesk.tools.AuthenticateNtlm]|[INFO]|[25]|: LOGGED_DOMAIN : null|
[15:22:12:562]|[05-08-2009]|[com.adventnet.servicedesk.tools.AuthenticateNtlm]|[INFO]|[25]|: Authorization message from Requestnull|
[15:22:12:562]|[05-08-2009]|[com.adventnet.servicedesk.tools.AuthenticateNtlm]|[INFO]|[25]|: NTLM message:null|

Here are two other errors I see frequently in the log also.

[15:47:30:421]|[05-08-2009]|[SYSOUT]|[INFO]|[23]|: Error !!!. Table header value not found for key -  |
[15:47:55:046]|[05-08-2009]|[com.adventnet.servicedesk.helpdesk.mail.task.MailFetchingTask]|[SEVERE]|[22]|: Exception when connecting to store.|javax.mail.AuthenticationFailedException: access denied

Can you please advise how to give more details, so you can assist us.

Regards,
Mark