nfs problem

[Jan Willem Stumpel <jstumpel@planet.nl>]

Machines A and B both run Debian. There are no firewall rules
blocking any kind of traffic A<-->B.

I try to mount, by means of nfs, a directory of B to a mount point
on A, read-write.

/etc/exports in B has:
/home/storage/video   A(rw,sync,subtree_check)

/etc/fstab in A has:
B:/home/storage/video /mountB nfs \
    user,rw,intr,rsize=8192,wsize=8192,timeo=14,noauto  0  0

If I call (on A)
   mount /mountB

I can read the contents of /home/storage/video on B. But I cannot
write anything to it. I keep getting the message "read-only
filesystem".

I hope there are some nfs experts here who can shed some light.

Regards, Jan