OAUTH 404 while switching from SA to ISAPI

[swiatex]

Hello,
I've encountered 404 while switching Google OAuth from SA to ISAPI (IIS).
On SA everything works fine (return to localhost:8888/$/oauth/v2 works fine). However when switching to ISAPI I got 404 when returning to mydomain.com/$/oauth/v2.
I suppose it's more server side IIS then Intraweb, but not sure if I miss something.
Any ideas how to troubleshoot? Could you please suggest debug ideas? 
Regards,

---

Just figured out that it should look like:

Code:

mydomain.com/app.dll/$/oauth/v2

rather that 

Code:

mydomain.com/$/oauth/v2

So this might be marked as solved. Im leaving it here as is in case if someone may face same issue.