Profitbase Studio / Server is using parts of the SQL Server API directly, so it is required that these components are installed on the same computer as the Profitbase Studio and/or Profitbase Studio Server. Although these requirements are listed in the System Requirements document, they may from time to time (using clever ninja tactics) avoid attention from people setting up the system.
So a quick recap of the SQL Server dependencies for Profitbase Studio / Server;
When PB Studio / Server is running on the SQL Server 2005 Platform
Install SSMS 2005 OR install Microsoft SQL Server 2005 Management Objects Collection which is a part of the SQL Server 2005 Feature Pack.
When PB Studio / Server is running on the SQL Server 2008 Platform
Install SSMS 2008 OR install Microsoft SQL Server 2008 Management Objects whis is a part of the SQL Server 2008 Feature Pack.