DR4000 and Backup Exec 10d

I have a DR4000 and am trying to create a "Backup-to-Disk folder" from Backup Exec 10d on a Windows 2003 Server.  I have tried using a mapped drive in the path but receive the error "The system cannot find the specified path." If I use the UNC path containing an IP Address, I receive the error "The path contains an invalid character .."

I was able to create a "Backup-to-Disk folder" from Backup Exec 9 on a different server so I don't understand why I can't get 10d to work.

Any help is GREATLY appreciated.