Changes made to login/passwords forms (login.fcc, smpwservices.fcc etc) are not reflected immediately in the browser.
There are many things that could go wrong here.
For e.g
[08/23/2017][10:12:03][5052][2620][CSmFormTemplateCache.cpp:196][CSmFormTemplateCache::GetForm][][][][][][][Serving form template '<Web_agent_root>\win64\samples/forms_en-US/login_en-US.fcc' from cache.]