Ovi Player / Ovi Suite Music not added to library

Question

Ok more weird Ovi annoyances:
Ovi Music / Player does not add certain songs from my iTunes folders (all Non DRM m4a files) to its library, neither automatically nor does it let me add them manually.
However, if transferred to the handset (N97) manually they will play fine. They also play fine when opened via File|Open in Ovi Suite or Player.
I first noticed it with
e:\Users\Max\Music\iTunes\Music\Israel Kamakawiwo'ole\Over the Rainbow - Single\ Over The Rainbow.m4a
Which I cannot add to the library in any way.
Ok,  I thought, Ovi trips up on special characters, but
e:\Users\Max\Music\iTunes\Music\The Von Bondies\Pawn Shoppe Heart\C'mon C'mon.m4a
e:\Users\Max\Music\iTunes\Music\The Men They Couldn't Hang\How Green is the Valley\The Ghosts of Cable Street.m4a
are both added just fine, while
e:\Users\Max\Music\iTunes\Music\The Von Bondies\Pawn Shoppe Heart\Not That Social.m4a
can again, not be added in any way.
Al right then, has to be that Ovi trips up over legal Windows path names that are too long for Ovi.
But
e:\Users\Max\Music\iTunes\Music\Neon Trees\Animal-Single\Aniimal.m4a
can again not be added in any way while
e:\Users\Max\Music\iTunes\Music\Orchestral Manoeuvres In the Dark\Messages - Greatest Hits\1-03 Enola Gay (2003 Remaster).m4a
is added just fine.
Sometimes when trying to add an album, only certain titles are not added, while the rest of the album is.
There seems to be no pattern whatsoever to this behavior, since it's not path lengths or special characters tha keep songs from bein added, it's also nit file type related as there some MP3s i can't add as well.
Note that M$ Media Player 11 has no issues adding the same bits to its own library.
I run Win 7 Pro 32.
Ever seen a black lemon? They turn black when they rot. My N97 is black. 'nuff said

Answer 1

It's getting weirder and weirder
E:\Users\Max\Music\iTunes\Music\Heinz Rudolf Kunze\Die Gunst der Stunde
was successfully imported including the first track
E:\Users\Max\Music\iTunes\Music\Heinz Rudolf Kunze\Die Gunst der Stunde\01 Hunderttausend Rosen.m4a
on another PC.
So the failures seem completely random, which would not be so tragic if you got a second chance, which you don't.
I'd still like to know what I need to delete to get rid of the entire music library. I just need OVI-Music / Suite to get some of my music to my phone and this should not be so tedious!
Ovi Suite seems to sotre stuff all over the place and you don't really know what's what, which makes fixing problems very frustrating.
iTunes keeps its stuff transparently in the same place, but then again I never had any such weird  problems with it in the past 5 years.
Ever seen a black lemon? They turn black when they rot. My N97 is black. 'nuff said