samba - Nov 2009 - send error in close -9

i'm trying to get some help regarding this error message running debian
lenny 5.  using CIFS and have a windows share (external HD) mounted in
fstab, mount works when copying files to/from.  but when doing extensive
read/writes (webserving from the mount) I get the error "send error in
close
= -9" it shows up in tty0 obviously inaccessable for a second (the mounted
drive).  Any help would be greatly appreciated I can post whatever info is
needed