I have a little app I wrote which uses WSI to update inventory. It worked flawlessly on ASPDNSF v8.x, but after an upgrade to v9.2 I am getting back the message

Server Unavailable, please try later

Watching the connection with Fiddler I see that I am getting a 500 error from the server.

Can anyone point me in the right direction to resolve this?

Thanks,
Rob