To OP and others: are you sure the problem is due to the credentials option? Check /var/log/kern.log. I tested with some of your options, and in kern.log I see:
> CIFS: Unknown mount option "auto"
To OP and others: are you sure the problem is due to the credentials option? Check /var/log/kern.log. I tested with some of your options, and in kern.log I see:
> CIFS: Unknown mount option "auto"