Make sure you removed your old sound card driver.
Disable any on board audio for now through bios....
And try to just have the new card working alone....
Then retry to open sonar....then go into the preferences, and re select a different audio driver like wmd....
hit apply, then do a second re select to the card driver you just installed.
See if that helps reset things for you...without the looping madness I witnessed the other day.
Best wishes.
Not sure about ini files or inf...for sonar....Someone who knows Sonar's Prog /Baker should say if it needs be deleted ...As I do not know what Sonar does with this file completely....
And the loop cannot be broken until you break the tie to what ever driver it is looking for, or mis mapping to.
I think it is a MS issue though/...