Hello,
I am having difficulties to work with authenticated scans...I tried in two different websites with no success. Here one example:

browser.goto 'http://<site>/Login.aspx'
browser.text_field(:id => '<nameID>').set('user')
browser.text_field(:id => '<namePass>').set('pass')
browser.input(:name => '<nameButton>').click
sleep(3)
framework.options.session.check_url = 'http://<site>/default.aspx'
framework.options.session.check_pattern = 'USAee USA-CAN'

also tried with .js with:

document.getElementById('<nameID>').value   = 'user';
document.getElementById('<namePass>').value = 'pass';
document.getElementByName('<nameButton>').submit();

Cmd line:

arachni/bin/arachni http://<site>/Login.aspx --report-save-path scans_results/test.arf --scope-exclude-pattern=logout.aspx --plugin=login_script:script=auth/test.rb --session-check-url=http://<site>/default.aspx --output-debug 3 --session-check-pattern='<string to check>'

Error: I get the error that the text box for username can't be found (below). That being said...if I build the same script in the command line by using watir, phantomjs, others...same id name...works flawless.

Arachni - Web Application Security Scanner Framework v1.2.1
   Author: Tasos "Zapotek" Laskos <[email blocked]>

           (With the support of the community and the Arachni Team.)

   Website:       http://arachni-scanner.com
   Documentation: http://arachni-scanner.com/wiki


 [~] No checks were specified, loading all.
 [~] No element audit options were specified, will audit links, forms, cookies, JSONs and XMLs.

 [*] Initializing...
 [*] Preparing plugins...
 [*] ... done.
 [~] Login script: System paused.
 [~] Login script: Running the script.
 [-] Session: [Watir::Exception::UnknownObjectException] unable to locate element, using {:id=>"<nameID>", :tag_name=>"input or textarea", :type=>"(any text type)"}
 [-] Session: /opt/sspider/arachni/components/plugins/login_script.rb:29:in `eval'

Any tips ? Thank you