I was not able to start Import/Export wizard.
The SSIS Data Flow Task could not be created. Verify that DTSPipeline.dll is available and registered. The wizard cannot continue and it will terminate.
Cannot create a task with the name "STOCK:PipelineTask". Verify that the name is correct.
I searched the DTSPipeline.dll in GAC (Shared Assembly folder). But there are both MSIL & x86 version.
After that I searched Program Files SQL Server folder & found the above dll.
I just registered this dll & my problem has been resolved.
Regsvr32.exe "C:\Program Files\Microsoft SQL Server\90\DTS\Binn\dtspipeline.dll"
Above command will register the required dll.