mics 6.0 w/asm,the first port off of the asm is ext 2269,assigned trunk 177 target line(DID 2269) when called from outside it rings in fine,the fax answers.But while it is busy and another fax comes in on xxx-2269I want it to give busy tone,but instead it rings 4 times then goes to gen del vm.the line is set up to be private to ext 2269. call forward to: none,if busy:busytone,1 appearance of target line.1 intercom button.when busy it still RNA to vm.what am I missing??