Why are you still trying to do it through SC Auto?
As I know SCAuto is still supported, but Peregrine seems to push its customers to connect-it.
If you want to open a ticket from a web application, why don't you try to use connect-it together with a self-implemented eventin-queue in SC?
So:
1) Tell your Web Application to store the data the user entered (in a database, textfile or whatever)
2) Tell Connect-It where to fetch wich data in which timespans
3) Tell SC there is a new eventin (maybe you can use the standard event-maps for creating a ticket)
4) Tell Connect-It about the eventin and do your mapping
5) Establish your schedulers for processing data
The only thing is, I'm not sure if there is a licence fee for Connect-It in this circumstances ...