Check http://www.dotnet247.com/247reference/msgs/51/259746.aspx

> I am using ms vs .net 2003 to debug a stored procedure remotely on sql2000. I am using windows server 2003 as my os. I get the following error, when I stepped into stored procedure from vs .net: unable able to start sql debug session. Ensure sqldbreg2.exe and proxy /stub dll sqldbg.dll are registered on this machine.
> I did registered the .dll on the server and also made sure the sqldebug account has the proper security right. I also installed vs .net on the server. Still I am unable to debug my stored procedure remotely.
>