I'm not quite sure, that it will help, but try this:

In a Windows Server 2003 domain
Open Active Directory Users and Computers.
In the console tree, click Users.
In the details pane, right-click the user you want to run agent under, and
click Properties.
Click the Delegation tab, select the "Account is trusted for delegation"
check box, and then click OK.

after that SQL Agent have started in my case.
Also be sure to check log-file via SQL Server management tool

url:http://www.ureader.com/msg/11426.aspx

I'm not quite sure, that it will help, but try this:

In a Windows Server 2003 domain
Open Active Directory Users and Computers.
In the console tree, click Users.
In the details pane, right-click the user you want to run agent under, and
click Properties.
Click the Delegation tab, select the "Account is trusted for delegation"
check box, and then click OK.

after that SQL Agent have started in my case.
Also be sure to check log-file via SQL Server management tool

url:http://www.ureader.com/msg/11426.aspx

I'm not quite sure, that it will help, but try this:

In a Windows Server 2003 domain
Open Active Directory Users and Computers.
In the console tree, click Users.
In the details pane, right-click the user you want to run agent under, and
click Properties.
Click the Delegation tab, select the "Account is trusted for delegation"
check box, and then click OK.

after that SQL Agent have started in my case.
Also be sure to check log-file via SQL Server management tool

url:http://www.ureader.com/msg/11426.aspx

I'm not quite sure, that it will help, but try this:

In a Windows Server 2003 domain
Open Active Directory Users and Computers.
In the console tree, click Users.
In the details pane, right-click the user you want to run agent under, and
click Properties.
Click the Delegation tab, select the "Account is trusted for delegation"
check box, and then click OK.

after that SQL Agent have started in my case.
Also be sure to check log-file via SQL Server management tool

url:http://www.ureader.com/msg/11426.aspx

I'm not quite sure, that it will help, but try this:

In a Windows Server 2003 domain
Open Active Directory Users and Computers.
In the console tree, click Users.
In the details pane, right-click the user you want to run agent under, and
click Properties.
Click the Delegation tab, select the "Account is trusted for delegation"
check box, and then click OK.

after that SQL Agent have started in my case.
Also be sure to check log-file via SQL Server management tool

url:http://www.ureader.com/msg/11426.aspx