X10 dim/bright commands wont work properly.

I´m using RFXCOM rfxtrx433 with Indigo 5. I cant get plugin to send X10 dim or bright commands properly.

If i adjust X10 dimmer (address A9, RFXCOM plugin device) brightness with Indigos slider it only sends "A9 brighten by 11" command.

I checked that connecting my old CM15pro controller to Indigo. I also use Marmitek TM13 to send X10 rf commands to powerline.

rfxtrx433 works perfect with my AC-dimmers and switches.

Any help?