After installing SQL Server Integration Services on an existing 64-bit SQL Server, I was unable to connect to SSIS using Management Studio.
The database engine and Analysis Services was already installed on this server. I added the SSIS service without Service Pack and applied SP3 afterwards. When trying to connect, Management Studio returned the following error message:
Connect to SSIS Service on machine “ComputerName” failed:
Error loading type library/DLL.
I found the explanation in the following support article: KB919224
This problem occurs because the installer unregisters the 32-bit Dts.dll file when the installer installs the 64-bit Dts.dll file. The 64-bit Dts.dll file is installed together with SQL Server 2005 SP2. Additionally, the 64-bit Dts.dll file may be installed together with any SSIS hotfix package that contains the 64-bit Dts.dll file.
The solution is to reregister the 32-bit dll’s manually:
%windir%\syswow64\regsvr32 “%ProgramFiles(x86)%\Microsoft SQL Server\90\dts\binn\dts.dll”
%windir%\syswow64\regsvr32 “%ProgramFiles(x86)%\Microsoft SQL Server\90\dts\binn\MsDtsSrvrUtil.dll”
For more info and some variations on the same problem, goto KB919224
