Calling Orchestration

Hi guys,
        I have created an orchestration which does not have receive shape, the initial shape is "decide" shape. I created a strong name assembly of this orchestration and have installed it in GAC. Now the problem is, in my another project I have call orchestration shape when I try to configure this, I select the "Select from reference assembly" option. The dialog box pops up , I see my assembly reference , but nothing on the right hand side view. (I am using Biztalk 2006). and the OK is disabled.

        Did I miss any step while creating my orchestration assembly?

Please advise,

Thanks