Can't delete file on TimeCapsule - Any tool?

[macdhf]

I can't delete a file on my Time Capsule. I receive the error "The operation can’t be completed because an unexpected error occurred (error code -8072)". (It's simply a backup of a .url bookmark file)

Filename starts with "..." ??? And I can't rename it either.

Have tried to reboot (also the TC)
Can see it in Terminal with ls command (in sudo -i state)
Have tried via Terminal with rm command - doesn't work.

Is there maybe a "power tool"/APP to use to force the deletion?

Can anyone help?

Best regards,
Macdhf