question about access modes with nfs server 1.1.4

hi,
I have installed the nfs 1.1.4 on my W2000 Professional pc.
I have exported one of my disks.

then I mounted the exported volume from my Debia 3.1 client.

I cann see the content of the exported volume,
but I cannot create, delete or change files
from my debian client

I'm new to nfs and linux,
so - perhapts anyone has an idea,
what I'm doing wrong ?

thanks and regards

ekkehard