[Solved] OMV freezes after short time & can't acces samba folder

Hello,
today I've set up my new NAS with Openmediavault, but i got a few problems: the system is freezing after changing, short periods of time.
First it starts normal, and then randomly freezes. When it freezes I get a no image via VGA and no connection via browser or ssh.
I got OMV 1.0 with latest updates and upgrades (via apt today)
Motherboard: Asrock c2750d41I
RAM 8GB
bootable medium: 64GB SSD
datadisk: 1TB HDD

Anyone a solution?

I'm currently running memtest, but it's a brand new SSD used for 2 days.
No I'm not using any backport kernels, I'm using the normal one from the site.
CPU temp is normal, too.

EDIT: Memtest was negative, no errors
I've tried a reinstall on a normal HDD and now it works, I'll try cloning the content of the HDD to the SSD and look if it works

I couldn't test it with the SSD yet, but with the HDD it works, and now I got another problem now.
First it takes very long to get into the WebGUI, even if OMV says it's reachable via browser.
The second problem is, that with the samba set up like in every tutorial here or somewhere else, I see my folders on my windows device, but some are not reachable and others says that I've entered a wrong password, which is 100% right.

Yes, I use ACL, but it is as I want it fot the folders. (I tried with privileges only but it didn't work)

The usernames are the same, but the passwords too. (you mean the windows user and passw compared with the user on the NAS, did you?)
For the users I've created 4 new users via webgui and put them in the sambashare group. Then I set the privileged and the acl of the folders and added them to the smb service.

I don't know, it's a clean install of OMV 1.9
I've installed a few plugins, but haved activated them yet.
Normally if I follow the tutorials everything should be OK.

I tried connecting with 4 pcs here, always the same.

Yes, I set it recursively via webGui.
I will try the commands later when i got time.

The commands say That I should have acces when I'm in the user group (what I am), but windows still is saying that I have no acces

I noticed that the Folders I can acces with my user account give me instantly the error that I have not the permissions for the folder and the ones where I have to use andother user account display a access denied error after typing the correct username and password

As User I don't get output of the folder, becuase I have no right to do.
As root the output is (where I should have acces:

root@NAS-vanBruegge:~# stat /media/be27e9ef-403e-4678-9762-fade43d22a34/Daten/Jan
  Datei: „/media/be27e9ef-403e-4678-9762-fade43d22a34/Daten/Jan“
  Größe: 4096           Blöcke: 16         EA Block: 4096   Verzeichnis
Gerät: 801h/2049d       Inode: 55836674    Verknüpfungen: 10
Zugriff: (2770/drwxrws---)  Uid: (    0/    root)   Gid: (  100/   users)
Zugriff    : 2015-01-11 18:04:00.324113910 +0100
Modifiziert: 2014-12-31 22:35:59.897919776 +0100
Geändert   : 2015-01-10 15:10:53.347956334 +0100
 Geburt    : -

I could set it up again, but if there is another way it would be better.

I finally found the solution:
My folders had the false rights, so only root can modifiy them using this command solved it:

chmod 0777 -R /media/<UUID>/<Folder>

I'll mark the threat as closed