Preview problem?

[BX5]

Hey guys, I'm having a problem which I hope you can help me fix.

So, a few days ago, I did my first CDLC and everything worked fine. Yesterday I made a new one, but for some reason Toolkit wasn't recognizing the preview file as a preview file (I am sure it was the right file with the right name, I've also tried remaking the files a few times), since I was using a older built of Toolkit it was letting me saving and generating the package without it (even though when I tried on Rocksmith 2014 it didn't worked out as it should). After a while I thought about trying to rebuild the CDLC that I've made earlier this week and the same problem happened (I've used the same files as I did before when it worked out fine), I figured out that the problem might have been of the Toolkit so I updated it, and actually it got worse, now it doesn't even let me save save the package or generate the CDLC (even though it says that if not provided a preview it will generate one).

It shows me this:

 

http://s1.postimg.org/q39kc587z/Sem_T_tulo.png

[BX5]

Hey again, turns out it was really my fault, I had indeed the right files with the right names, but I was selecting the wrong one everytime (even though I tried different ones).

I've tried to delete this entry, but I didn't know how, so I leave here this reply so you know that I "fixed" it.