This may seems like a typical question that already been asked in DCRUM forum. But in my case, I've already verify my case with the visit-tagging of AppMon. So I am pretty sure the request parameter used for username recognition of DCRUM is correct.
Other than this, I also use Web Browser developer tools and use Wireshark to open the tcpdump of AMD, to be sure of the request parameter used is correct, they all give me consistent result.
So, why am I not getting the user recognized in DCRUM? Here is how I configured.
In AppMon (for verification purpose):
I've also try text search or text phrase search instead of request parameter, still no luck.
Did you use the wizard to create this rule?
If you know the exact parameter name then use the wizard and find for that parameter e.g. I found 'loginid' in the 'Cookie', then select that one which will automatically fill the form for you and then you can test the result.
This is the easiest and recommended way.