1. Add any new parameters after the first 3 default parameters –d, -e, -l. IMPORTANT never change sorting of these parameters!
2. Specify the ";" delimiter between each parameter! SSCM uses ";" as the delimiter between parameters.
3. Do NOT use a space after the delimiter and the parameter identifier (which is the "-" character).
   
   Copy it back to startup paramaters - save - RESTART the service!
4. Check the current SQL Server error log and verify that each parameter shows up in a new line and starts at the same indentation.

But now in SQL Server 2012 we have a "Startup Parameters" Tab!

1. Add any new parameters in the Textfield (NEVER REMOVE the first 3 default pramaters!!!)
2. 
   
   
   
   
   
   
3. After restarting check the current SQL Server error log and verify that each parameter shows up in a new line and starts at the same indentation.

Where to find out about trace flags

Checking the status of trace flags

You can check the status of your trace flags by using the following command:
DBCC TRACESTATUS

If you want to know something about Trace Flag 3226, please read Christoph Muthmann's (aka cmu) post:
Trace Flag 3226