Sorry forgot the pluto bit.
Check the devices tree in the web admin. Go down to the server device, expand that, then you will see the share device under that. Look at its properties at the bottom - is the online box checked or not? If it is unchecked then that is the issue, you need to troubleshoot why it isn't checked (checking it manually will not work). Could be cifs vs smbfs, username/password issue, readonly issue or a range of other issues. Essentially, Linux can see the files through the file protocol used which is why you can search for them, but LMCE's media management (like StorageRadar, etc) believes the share is offline for some reason so it doesn't present the files in the normal view.
If it is checked, then it should be scanning in media, and you will see what it is doing in the log file indicated above. Again, note if you have thousands of media files/pics, then it will take hours to complete the scan - and it only addes files/folders to the database as it completes each folder. So if you have many files in the first folder it encounters, then it will have to complete scanning that folder before they will appear in the media grid....
The check box and the log file are the key...