Issue with importing tracks into Traktor Pro.

Hello.

I cleared my `Track Collection' in Traktor Pro because I want to start fresh.

Now after analysing some tracks, the tracks aren't visible when I click the `Track Collection' button.

Also it shows that in the Artists area the correct # of tracks I just analysed, but when I click Artists button it is blank - only the actual artists names are listed as a sub-folder of Artists, when clicked upon shows the track for that artist.

I don't know if I am doing it wrong? Previously it worked fine though.

Thanks.

PS : I just imported another four tracks as a test, and now only 3 of the 4 are showing up in Track Collection - but why not the 4th file?
And also it's not showing the other files I recently imported, only these three.:(

I closed Traktor and re-opened it - now it seems to show the track collection, etc correctly. Strange but lesson learnt.