Glue A Shape To Another In Visio Using GlueTo?

I am trying to glue a shape to another in Visio using GlueTo

Here is the code

Set trgObj = Cell.shape.Document.Masters("Trigger").Shapes(1)
Dim x As shape
Set x = ActivePage.Drop(trgObj, flowConnector.CellsU("PinX"), flowConnector.CellsU("PinY"))
Dim vsoCell1 As Visio.Cell

[code].....

it returns "Inappropriate target object for this action", but what is strange is that the code i am using I obtained from recording a macro. I can't understand why the code works when I record it in a macro but when I use it it doesn't.