Unable to access 'Daily Merchant Report'

Unable to access 'Daily Merchant Report'. Shows 'Unauthorized' error message in the log

1) Create a tunnel for the realm
2) Access the report using the specified path
e.g.,
http://amlntttesting.aq-qa2-front1:2424/sapi/rest/reports/2013/08/30/DAILY_RESELLER_PERFORMANCE_REPORT.csv

Shows the following error on tomcat log

Address: http://amlntttesting.aq-qa2-front1:2424/sapi/rest/reports/2013/08/30/DAILY_RESELLER_PERFORMANCE_REPORT.csv
Http-Method: GET
Content-Type:
Headers:

{Accept=[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8], accept-encoding=[gzip, deflate], accept-language=[ja,en-us;q=0.7,en;q=0.3], connection=[keep-alive], Content-Type=[null], host=[amlntttesting.aq-qa2-front1:2424], user-agent=[Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0]}

--------------------------------------
2013-09-04 13:48:06,402-187788535 [http-8080-10] WARN com.thesearchagency.sapi.security.AuthorizationInterceptor [timezone=Etc/UTC, principalId=, requestId=ee2f89c6-c22d-4bf0-8ddc-efdc916d6818, locale=ja, authToken=null, hostname=0:0:0:0:0:0:0:1, ipAddress=0:0:0:0:0:0:0:1] - Unauthorized
2013-09-04 13:48:38,468-187820601 [OrderScheduler_Worker-3] INFO com.thesearchagency.sapi.services.order.OrderStatusUpdateJob [] - Beginning update for 0 orders.