SAP B1 HANA - attachment folder is frequently not mounted

Using SAP Business One HANA 9.3 PL04.

The attachment way is located successful the shared folder \\xx.xxx.xxx.xx\b1_shf\Attachment.

We person mounted the attachment folder to the way mentioned truthful that erstwhile we nonstop an AR invoice with an attachment from SAP to the customer, the lawsuit volition person the AR invoice PDF copy.

However, it happens often that the attachment folder volition not beryllium mounted suddenly. We person to re-mount the attachment path. 

I'm not definite why. Any clue? 

FYI, we equine the attachment way utilizing 'root' ID, and the 'root' ID password contains peculiar characters similar '!@#' Could this beryllium the cause?