Biztalk Pipelines

We have started using Biztalk 2013 and Visual Studio 2012. We have discovered a strange isssue with pipelines. A pipeline toolbox is empty! I have imported a pipeline from a previous project, which used Biztalk 2010 and Visual Studio 2010, and heres what i've got:

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Has anyone faced this issue? Is there any fixPacks?

Solution

It was the .NET framework version of the BT project file issue. Biztalk 2010 is using 4, and BT 2012 is using 4.5. Changing it has solved the problem.