Problems reading and writing to server - Mac OS 9.2

I am trying to make a connection between a Macintosh computer (Mac OS 9.2)
using libwww to a Microsoft Exchange server. At the server side you can see
that a connection is made but there is never any data send to the server.
This means that the log-in request does not arrive...
 
The log-file of the program seems to indicate the same thing. I see a write
error and a read error.
Here is a copy of a part of the logfile:
 
~~~~~~~
 
HTHost 0x0fd41f60 going to state TCP_NEED_CONNECT.
HTHost 0x0fd41f60 going to state TCP_CONNECTED.
HTHost 0x0fd41f60 connected.
Host connect Unlocking Host 0x0fd41f60
StreamStack. Constructing stream stack for text/x-http to text/xml
Tee......... Created stream 0x0fd310e0 with resolver 0x0fcc7f2c
HTTP........ Dumping response to `w3chttp.out'
Tee......... Created stream 0x0fd31100 with resolver 0x0fcc7f2c
HTTP........ Dumping request to `w3chttp.out'
Memory Free. 0x0fd28fd0
Memory Free. 0x0fd2b2c0
Memory Free. 0x0fd2dad0
Memory Free. 0x0fd28fd0
Memory Free. 0x0fd2ab70
Memory Free. 0x0fd2dad0
Memory Free. 0x0fd2b2c0
Memory Free. 0x0fd31f70
HTTP........ Generating HTTP/1.x Request Headers
HTTP........ Generating General Headers
MIME........ Generating Entity Headers
Buffer...... Flushing 0x0fd2b320
Error....... Add  73    Severity: 1 Parameter: `Mac OS error  (-1404)'
Where: `NETWRITE'
Memory Free. 0x0fd312c0
Timer....... Created one shot timer 0x0fd312c0 with callback 0x0fcc7fdc,
context 0x0fd31060, and relative timeout 25
Uploading... Holding 0x0fd31060 for 25 ms using time 0x0fd312c0
Event....... Register socket 3, request 0x0fd3e9e0 handler 0x0fcc795c type
HTEvent_READ at priority 20
Event....... Registering socket for HTEvent_READ
Event....... New value for MaxSock is 3
Error....... Add  73    Severity: 1 Parameter: `Mac OS error  (-1404)'
Where: `NETREAD'
Memory Free. 0x0fd310a0
Host kill... Pipeline due to HTEvent_CLOSE event
Host kill... Terminating net object 0x0fd3f720 from pipe line
HTTP Clean.. Called with status -1, net 0x0fd3f720
Memory Free. 0x0fd31bb0
Memory Free. 0x0fd31100
Memory Free. 0x0fd31120
Memory Free. 0x0fd2b2f0
Memory Free. 0x0fd31440
Memory Free. 0x0fd31180
Memory Free. 0x0fd31fa0
Timer....... Deleted active timer 0x0fd312c0
Memory Free. 0x0fd312c0
Net Object.. Delete 0x0fd3f720 and call AFTER filters
Host info... Remove 0x0fd3f720 from pipe
Host Object. closing socket 3
Channel..... Semaphore set to 0 for channel 0x0fd2b200
Event....... No more events registered for socket 3
Event....... Reset MaxSock from 3 to 1
Memory Free. 0x0fd31620
Memory Free. 0x0fd31fc0
Event....... Socket 3 unregistered for HTEvent_READ
Event....... Couldn't find socket 3. Can't unregister type HTEvent_WRITE
Channel..... Delete 0x0fd2b200 with semaphore 0, status -1
Channel..... Delete input stream 0x0fd488e0 from channel 0x0fd2b200
Memory Free. 0x0fd50d10
Memory Free. 0x0fd31b50
Memory Free. 0x0fd310e0
Channel..... Delete input stream 0x0fd488e0 from channel 0x0fd2b200
Memory Free. 0x0fd31cf0
Socket read. FREEING....
 
~~~~~~~`
 
Looks like there is a problem writing and reading so possibly the connection
is not made correctly.
Could it be that I am missing some software on my macintosh or that I miss
something else ?
Does anyone have an idea where I should look at to find a solution ?
 
thanks in advance...
 
 
Greetings,
 
 
Pim