Writefile return ACCESS_DENIED on shared network

I’am on my driver filesystem and i share a directory of my disk.
I share a directory from my virtual disk , i see my network share.

Problem :
WriteFile return error ACCESS_DENIED on a file shared network of my virtual disk filesystem

Why ?
Thank

I added :
When i copy file “API runtime ‘CopyFileEx’” from native disk into network directory shared disk filesystem, it’s OK IRP_MJ_WRITE return STATUS_SUCCESS,

problem asynchronous ??

My problem is :
The IRP_MJ_WRITE is not called only on a file from shared directory virtual disk filesystem.

I tested with FileTest , IRP_MJ_WRITE is called if ‘DesiredAccess’ passed into ‘NtCreateFile’ has not bit DELETE (0x10000).

I have this problem only if it’s a file from shared directory of virtual disk.

I had shared the directory with right write, read with the user ‘everyone’