got RRD files, no graphs

[windsor]

I've been beating on this thing with a rubber mallet for two full days now.

I finally have PHP5 happy with IIS6 (on W2k3 server)
I finally am getting RRD files
I am not getting images.

It seems that dynamic image-generation via rrdtool isn't working. I enabled debug mode and refreshed a browser pointing at the graphs to get some good output in the log file. If I cut'n'paste that into a cmd window on the server, it spits out PNG (which I have to capture via "> foo.png").

I'm using the latest supported versions of everything:
cacti-0.8.6g
rrdtool-cygwin-1.2.11
php-5.0.5
mysql-4.1.15
net-snmp-5.2.1.2-1.win32.exe

Underlying versions are:
W2k3 Server
IIS v6(?)

I tried this with IE and firefox, so it isn't a browser issue.

(fwiw, I'm a Solaris admin, I have assorted reasons to make this work on win32 )

[BSOD2600]

Try setting up the various permissions I've outlined in my updated windows guide first.

[windsor]

Ok, finally got it.

The server is in an AD domain and by default it will not search local accounts when setting security, so user IUSR_XXXX (where XXXX is machine name, of course) was not appearing as a valid account.