Hi Debra,
first, it should be noted, that you're only getting 1 request. POST's appear twice in the log, once after the header arrives, and once again after the data arrives. (this is because large Posts can take time to arrive, and if a Post causes the system to crash, then at least the header part is in the log so you have some clues.)
The first debugging step I'd take here is to turn on the Project option
NetShowSend=>1
This will send all _output_ from the server to Debugview.
the problem is either
a) the data is going out compressed as before
b) nothing is going out
c) something is going out, but the remote device does not like it.
The NetShowSend will at least identify which of these is in play, and from there we can look at how best to fix the problem.
cheers
Bruce