Error using invoke with instrument driver

Hello! I try to grab measurements from the osciloscope. Connection with icdevice is succesefull, but when I try to enable channels in such way:

deviceObj = icdevice('Ag546XX.mdd', 'ASRL22::INSTR');
connect(deviceObj);
groupObj = get(deviceObj, 'Configurationchannel');
invoke(groupObj, 'Configurechannel', 'Channel1','Coupling',1,'ProbeAttenuation',1,'Enabled',true);

i get an error

Error using icgroup/invoke (line 93)
Parameter must be scalar.

I would be grateful for any help!