Complicated CDbExpression

I’m trying to to AR and CDbExpression to add a designated number of seconds to a record. It always ends up setting it to the current time + $timeIncrement, not sure why other than endDate might have to be fully qualified??

Probably missing something stupid and figured having another pair of eyes would help.

$this->endDate = new CDbExpression('TIMESTAMPADD(SECOND,:seconds,endDate)', array(':seconds'=>$timeIncrement));

$this->save();

not entirely sure why it posted this thread 3 times, I did get a lovely ipboards SQL error though.