XBMXLive 11 (eden) Windows share access problem

Hi,

Tis is the LAN:
1x NAS (Windows Server 2008 R2, Domain Controller) with Media Data served via standard Windows share
1x PC running XBMCLive 11 Eden run from SSD
1x iPad 2 iOS 5.1.1

- On iPad running XBMC for iOS with an added source "smb://192.168.11.3/Movies" with saved Username & Password and it works really like a charm!
- On the PC I want to do this in the same way, but always ask for Username & Password but it does add the share - it's like I enter a wrong User or pass but it's absolutely the right one (it's the same as on my iPad where it is working).

Do you please have any hints for me?


Thank you & greetings
cya