T-SQL Debugging Logon Failure

Server Info: Windows Server 2008, SQL Server Standard 2008 (64-bit)

I recently upgraded to SQL 2008 and was interested in trying out T-SQL Debugging. Initally encountered some firewall issues, but after disabling my workstation's Windows Firewall and having TCP port 135 and UDP 4500/500 opened up by the IT group I got a little further.

Now I get the error message:

Unable to start T-SQL Debugging. Could not connect to computer 'servername'. Logon failure: unknown user name or bad password.

My workstation and server are on different domains and I use Windows authentication to connect to the machine. My account is sysadmin and connects to the server fine in SSMS. The SQL Server service is running as a different service-level account.

Thoughts?

I have seen the same error message. My configuration, however, is different. I am connected from Management Studio 2008 with an SQL user to a SQL Server 2008 instance.

I user a sniffer (Wireshark) to monitor IP traffic en saw the following:

• DCERPC Bind: call_id: 5 IRemUnknown2 V0.0, NTLMSSP_NEGOTIATE
• DCERPC Bind_ack: call_id: 5, NTLMSSP_CHALLENGE accept max_xmit: 5840 max_recv: 5840
• DCERPC AUTH3: call_id: 5, NTLMSSP_AUTH, User: \
• IRemUnknown2 RemRelease request[Malformed Packet]
• TCP 49914 > mapper-mapethd [ACK] Seq=247 Ack=526 Win=63846 Len=0
• DCERPC Fault: call_id: 5 ctx_id: 0 status: nca_s_fault_access_denied

Note: my actual domain and user have been replaced by and , respectively.

Maybe, this can help you to get more detailled information.

At this point, I am stuck. I tried to give this domain user access to the server, but do not have permission to do so. Also, I am not sure if this is needed, because I connect using an SQL user.