Why is NetDrive trying to use PASV connection when it's not marked?

Connecting to 66.xxx.xxx.34 ...
220 Service Ready for new User
USER ojbertsch
331 Password Needed for Login
PASS *******
230 User ojbertsch Logged in Successfully
PWD
257 "/sys/users/ojbertsch" is Current Directory
Root Dir /sys/users/ojbertsch
File Transfer: Default Mode: BINARY
Connected to 66.146.xxx.34
Get directory /
CWD /sys/users/ojbertsch
250 Directory successfully changed to "/sys/users/ojbertsch"
PWD
257 "/sys/users/ojbertsch" is Current Directory
TYPE A
200 TYPE Command OK A
PASV
227 Entering Passive Mode (192,168,1,2,7,133)
Connect PASV to 192.168.1.2 7,133
Winsock Error: 0
WSA Error: 21
227 Entering Passive Mode (192,168,1,2,7,133)
Can't get directory
....
<does this many more times>
....
Get directory /
CWD /sys/users/ojbertsch
250 Directory successfully changed to "/sys/users/ojbertsch"
PWD
257 "/sys/users/ojbertsch" is Current Directory
TYPE A
200 TYPE Command OK A
PASV
227 Entering Passive Mode (192,168,1,2,7,156)
Connect PASV to 192.168.1.2 7,156
Winsock Error: 0
WSA Error: 21
227 Entering Passive Mode (192,168,1,2,7,156)
Can't get directory

Any ideas? Running NWSB6.5/SP2 in all offices. Also running router/NAT
in all offices with static map from outside to inside.

TIA - Jeff