Can't save in plugin folder

[MatrosDK]

I have to bother you guys with a problem og mine. I have searched the forum, but I haven't been bale to find anything.

I am using a DS-106 and SSDOS r2.b2

I am trying to save a plugin to the Slimserver\Plugins folder.
I am logging in to Windows as "Kontor". I have created a user on the DS-106 called "Kontor" and have given this user RW rights to the Slimserver drive.

But I am not allowed to save anything to it anyway. I can see that the ReadOnly attribute is set for the drive, but I am not able to remove it (The ReadOnly attribute).

I have stopped Slimserver, that it is nothing something there.
I have tried to restart DS-106 after I stopped Slimserver (And I remembered to disable the automatic start of Slimserver).
But still, no access.

Can anyone tell what I am doing wrong?

[MatrosDK]

I managed to find the solution myself: There's a big difference between logging in as "Administrator" and "admin". I was confused the "Administrator" username used in Synology Assistent, and used that log-in name. But as described in the SSDOS read-me it shall be "admin" if you shall have the necessary rights in the "SlimServer\Plugins" folder.