Sip phone not connecting

hi everyone, I need some help here. ive installed incredible pbx and openfire on the same system. when I configure a phone maping in openfire and then click on test, the test succeds. but when I open spark the phone plugin always fails to start. ive checked the logs and I don’t see anything in the logs that would indicate an error anything, so I was wondering if anyone has any ideas. any help would be apprecieated