The replace model should work fine so long you have fulfilled the conditions outlined by @Tarun_Jaiswal.
There might a problem with your SketchUp model. Perhaps it is too complex? As for SketchUp Pro, there is no difference between SketchUp Pro and Standard free version in the ESRI-SketchUp workflow.
I recommend you try the recommended workflow whereby you starting point of ArcGIS data, building footprints for example. Extrude a simple footprint - convert to "CLOSED" multipatch - export to Collada - import to SketchUp - make simple 3D modifications making sure to close all faces - save skp model - back in ArcScene replace model
It is essential you close all faces in SketchUp and keep the model simple. There are a number of SketchUp plugins that are used for model validation. Once all faces have bee closed and the model is valid you should have no problems. I also had some success using fairly complex sketchup modes as 3D symbols then scaling and rotating them as needed but I would only recomened this technique is you are placing random 3D object into your scene.
