memman

I am having an access problem trying to mount WHS 2011 shared files/folders on my Android tablet. This may be an easy solution, but it is eluding me. After installing WHS 2011, I can remotely access WHS by ***.homeserver.com and I can access via remote desktop. However, there are times when I need to access remotely files on the WHS server. I need to upload, download, rename files to/from my Android tablet. There are file manager apps such as CIFS Manager, ES File Explorer, etc that allow remote files/folders to be mounted, but I cannot get the proper URL to get these apps to find the WHS file server. If I am on my local network, I can use a local IP address (e.g., 192.168.1.120) with any of these Android apss to mount. But when I go remote, none of these apps will accept my DynDns address or ***.homeserver.com. I have forwarded ports 80 and 443 in my router to point to the local WHS IP address. This is driving me crazy. Have I missed the obvious here?