Disk Mount Error , Try to Reboot with LMS on pCP

I used to have a mount point for my music library on my Windows server working just fine, but since I had some server crashing issues (since fixed) I cannot get pCP to remount my network drive.

Before I got:

[INFO] mount -v -t cifs -o username=bruno,password=[snip],uid=1001,gid=50 //192.168.1.3/"Brunos music" /mnt/music
mount: //192.168.1.3/Brunos music mounted on /mnt/music.
[ INFO ] Disk Mounted Successfully.

Now I get :

[INFO] mount -v -t cifs -o username=bruno,password=[snip],uid=1001,gid=50 //192.168.1.3/"Brunos music" /mnt/music
[ERROR] Disk Mount Error, Try to Reboot.

It's the same after rebooting, obvs. Nothing has changed on the server (apart from me changing the mobo/cpu). I've tried adding vers=1.0/2.0/3.0 even though this wasn't needed before, to no avail.
I can 'net use' the share from a separate windows box just fine.

Any ideas how to diagnose?