I'm a new users of the forum and sme servers

I have installed a sme server 8.0 because i'm interested for ftp plug-in.
I read the guide and now my server working. I set the permission of the users for full permission, but I can't upload files to my ftp server from internet explorer. I try to explain better: If I use Filezilla I can upload to my directory all file that i want, but i wan't use it.. I like to go with my internet explorer (ftp will use by windows client unfortunately).
If I open a windws folder the I write
ftp://admin@000.000.000.000/ I can enter to my ftp but the funciont drug & drop doesn't work....(it is start to copy but an error appair due write permission to folder)
Anyone can tell me where I can fix it??
Thank very much in advance!!!
Hi Fabio