TiniHttpServer and GPRS or Tynamo?

This is my first post, so hello to all.

I need some assistance debugging a TINI problem.

I have a Tini 400, firmware 1.12.
This is connected to a GSM/GPRS modem via serial4.

Thus far, I have a ppp client program written and tested, that will connect
to the internet over both GSM and GPRS, and will host a basic web page based
on TINIWebServer.  (I should mention that I have static IP GPRS)

The problem comes with TiniHttpServer.  When connected over ethernet or GSM,
TiniHttpServer works just fine.  It just won't work over GPRS.  The remote
web browser sends the request to the Tini, which sees the request and goes
into state . It then gets stuck and the TiniHttpServer won't send the web
page up the serial link to the web. (I know because I am monitoring the
serial between the TINI and the modem)

Anyone seen this before?

I've checked the TiniHttpServer properties and it is using port 80.

I've also followed all the tips in the archives about GPRS.  My ppp
connection is the default, and my ethernet subnet is 255.255.255.255

Has anyone managed to get a web server to run properly over GPRS?  Should I
be using Tynamo instead?  (I have tried Tynamo, but could not get it to
build correctly for my firmware)

As ever, I'm on a tight deadline with this, so would appreciate some help
from anyone out there.

TIA,

Simon

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