.dae / Collada Import problem.

Im having a Serious problem here.
Im using Google Sketchup free and this is a problem for unity because I can view them outside of unity it works but inside of unity when I import it it has a symbol of a prefab with a white file in front. I put it in and No rendering. When I try to open it thru unity into Preview it says That the file is un-readable!
This is weird because I was playing with unity (Can't remember what version but) I updated and then this problem started.

It's pretty important because I'm trying to import the map and thats the main part of the game!

Help please and thanks in advance

 

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