KNX bus: timeout waiting for group read response:

Hello ,

I have problem that my values are not read from openhab.
Openhab send the read request to the aktor send the answer back. But openhab says:

Cannot read value for item ‘Shutter_GF_Southside_3’ from KNX bus: timeout waiting for group read response: timeou

My Item :

Rollershutter Shutter_GF_Southside_3 “Shutter [%d %%]” (All) { knx=“0/0/5, 0/0/7, <0/0/6” }

ETS GA : Read ;Communication;Write;Transfer;Refresh;

Log

2016-09-13 21:40:02.372 [DEBUG] [b.k.i.connection.KNXConnection:419 ]- Success: connected.
2016-09-13 21:40:02.374 [DEBUG] [.KNXBindingDatapointReaderTask:92  ]- Autorefresh: Sending read request to KNX for item 'Shutter_GF_Southside_3' DPT '5.001'
2016-09-13 21:40:12.419 [WARN ] [.KNXBindingDatapointReaderTask:103 ]- Autorefresh: Cannot read value for item 'Shutter_GF_Southside_3' from KNX bus: timeout waiting for group read response: timeout
2016-09-13 21:40:12.420 [WARN ] [.KNXBindingDatapointReaderTask:127 ]- Autorefresh: Remaining retries for address '0/0/6' = '2'
2016-09-13 21:40:12.422 [DEBUG] [.KNXBindingDatapointReaderTask:70  ]- Autorefresh: DatapointReaderTask Waiting 50 msecs to prevent KNX bus overload
2016-09-13 21:40:12.473 [DEBUG] [.KNXBindingDatapointReaderTask:58  ]- Autorefresh: Waiting for new item in reader queue
2016-09-13 21:40:12.474 [DEBUG] [.KNXBindingDatapointReaderTask:60  ]- Autorefresh: got new item Shutter_GF_Southside_3 in reader queue
2016-09-13 21:40:12.475 [DEBUG] [.KNXBindingDatapointReaderTask:64  ]- Autorefresh: Trying to read form KNX bus: command DP 0/0/6 Shutter_GF_Southside_3, DPT main 0 id 5.001, low priority
2016-09-13 21:40:12.475 [DEBUG] [.KNXBindingDatapointReaderTask:92  ]- Autorefresh: Sending read request to KNX for item 'Shutter_GF_Southside_3' DPT '5.001'
2016-09-13 21:40:22.480 [WARN ] [.KNXBindingDatapointReaderTask:103 ]- Autorefresh: Cannot read value for item 'Shutter_GF_Southside_3' from KNX bus: timeout waiting for group read response: timeout
2016-09-13 21:40:22.481 [WARN ] [.KNXBindingDatapointReaderTask:127 ]- Autorefresh: Remaining retries for address '0/0/6' = '1'
2016-09-13 21:40:22.482 [DEBUG] [.KNXBindingDatapointReaderTask:70  ]- Autorefresh: DatapointReaderTask Waiting 50 msecs to prevent KNX bus overload
2016-09-13 21:40:22.533 [DEBUG] [.KNXBindingDatapointReaderTask:58  ]- Autorefresh: Waiting for new item in reader queue
2016-09-13 21:40:22.534 [DEBUG] [.KNXBindingDatapointReaderTask:60  ]- Autorefresh: got new item Shutter_GF_Southside_3 in reader queue
2016-09-13 21:40:22.534 [DEBUG] [.KNXBindingDatapointReaderTask:64  ]- Autorefresh: Trying to read form KNX bus: command DP 0/0/6 Shutter_GF_Southside_3, DPT main 0 id 5.001, low priority
2016-09-13 21:40:22.535 [DEBUG] [.KNXBindingDatapointReaderTask:92  ]- Autorefresh: Sending read request to KNX for item 'Shutter_GF_Southside_3' DPT '5.001'
2016-09-13 21:40:32.543 [WARN ] [.KNXBindingDatapointReaderTask:103 ]- Autorefresh: Cannot read value for item 'Shutter_GF_Southside_3' from KNX bus: timeout waiting for group read response: timeout
2016-09-13 21:40:32.544 [WARN ] [.KNXBindingDatapointReaderTask:127 ]- Autorefresh: Remaining retries for address '0/0/6' = '0'
2016-09-13 21:40:32.545 [DEBUG] [.KNXBindingDatapointReaderTask:70  ]- Autorefresh: DatapointReaderTask Waiting 50 msecs to prevent KNX bus overload
2016-09-13 21:40:32.596 [DEBUG] [.KNXBindingDatapointReaderTask:58  ]- Autorefresh: Waiting for new item in reader queue
2016-09-13 21:40:32.597 [DEBUG] [.KNXBindingDatapointReaderTask:60  ]- Autorefresh: got new item Shutter_GF_Southside_3 in reader queue
2016-09-13 21:40:32.598 [DEBUG] [.KNXBindingDatapointReaderTask:64  ]- Autorefresh: Trying to read form KNX bus: command DP 0/0/6 Shutter_GF_Southside_3, DPT main 0 id 5.001, low priority
2016-09-13 21:40:32.599 [DEBUG] [.KNXBindingDatapointReaderTask:92  ]- Autorefresh: Sending read request to KNX for item 'Shutter_GF_Southside_3' DPT '5.001'
2016-09-13 21:40:42.605 [WARN ] [.KNXBindingDatapointReaderTask:103 ]- Autorefresh: Cannot read value for item 'Shutter_GF_Southside_3' from KNX bus: timeout waiting for group read response: timeout
2016-09-13 21:40:42.606 [WARN ] [.KNXBindingDatapointReaderTask:130 ]- Autorefresh: Give up, could not read address '0/0/6' after '3' retries.
2016-09-13 21:40:42.607 [DEBUG] [.KNXBindingDatapointReaderTask:70  ]- Autorefresh: DatapointReaderTask Waiting 50 msecs to prevent KNX bus overload
2016-09-13 21:40:42.658 [DEBUG] [.KNXBindingDatapointReaderTask:58  ]- Autorefresh: Waiting for new item in reader queue

Can someone help ? It try now differnt things but nothing help.
In ets the response looks ok …