Altiris Deployment Server and Database issue

I have an issue where we have setup an Altiris deployment server, anyone in local admins can access the Altiris console with no issues, as they have sysadmin provileges within SQL to the express database.
But a separate group of non admin users that I have given the public role within the DB keep getting prompted to enter credentials when launching the console.
The logs within SQL produce the following error:

Login failed for user "CURRA\XXXXXX".CLIENT
Error 18456. Severity 14 State 16

If I give the group the sysadmin rights, they can login without issue and the deployment
server works as it should.

The server is a Windows 2003 box with SQL2005.
The version of Altiris RDP is 6.8 SP2
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Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
>> Error 18456. Severity 14 State 16

Your error state mentions that Default Database is missing for this login:

Run this from some other high privileged login:

rimmenaAuthor Commented:
Tried that and still get the same issue.
Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
>> But a separate group of non admin users that I have given the public role within the DB

Grant CONNECT privilege to your database and then try it out..
If not, then create a new login with db_owner privilege and try which should work.

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rimmenaAuthor Commented:
This helped, but looks like the group does require the sysadmin role.
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