Why no message is available after transmitting CAN Message

I am using a PEAK CAN-USB device to connect my DSP with Matlab and communicate using CAN-Communication. I was following this example till I stuck on some problems. First of all, using canHWInfo, I can only detect 1 channel in my CAN device and in the example, there are 2 channel for each device, this could be the cause of the problem. I will refer to this later.

>>info = canHWInfo

Vendor    |         Device          | Channel | Serial Number |               Constructor               
  ----------- | ----------------------- | ------- | ------------- | ----------------------------------------
  MathWorks   | Virtual 1               | 1       | 0             | canChannel('MathWorks','Virtual 1',1)
  MathWorks   | Virtual 1               | 2       | 0             | canChannel('MathWorks','Virtual 1',2)
  PEAK-System | PCAN-USB (PCAN_USBBUS1) | 1       | 0             | canChannel('PEAK-System','PCAN_USBBUS1')

So I proceed with defining 2 CAN-channel variable, for sending and receiving the data.

>>canch1 = canChannel('PEAK-System','PCAN_USBBUS1')
>>canch2 = canChannel('PEAK-System','PCAN_USBBUS1')

After transmitting the data, I noticed that the everything is similar to the example except that MessagesAvailable is empty. When no message is available, I cannot proceed to receive any data. So can anyone tell me why is this happening? Could this be because I am using the same channel to send and receive the data? How come a message is already transmitted but no message is available?

>>transmit(canch1,messageout)
>>canch1

Status Information:
               Running:1
     MessagesAvailable:0
   MessagesTransmitted:1
  InitializationAccess:1