I would do the following things:
1) Setup & Configure a syslog server
2) Create a new GPO via Group Policy Management with these settings:
Computer Configuration -> Policies -> Window Settings -> Security Settings -> Local Policies -> Audit Policy
a) Enable "audit logon events" with success and if you want failure
3) Create a new OU called "Terminal Servers"
4) Move your Terminal Server to this OU
5) Assign this new GPO to this OU
6) Configure the syslog server to retrieve the logs from this terminal server
7) Now utilizing the syslog server's gui (fat client or browser), you should now see events.
Free Syslog Server: http://www.solarwinds.com/products/freetools/kiwi_syslog_server/
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