Been through this with Intouch 10.5.....
I assume you also installing an IO Server? If IO server is older than Intouch 10, that may be your problem.
Depending on the version of the IO Server, you may need to install it first.
Intouch and the IO Severs both setup the Rainbow Sentinel key. Yet, there are different versions of the Rainbow install. Obviously...You want the newest version.
Try installing the IO Server first and then Intouch.