Labview misses a read when using Ni USB 8473 can interface

I was wondering if anybody here has had experience with this problem... I already talked to a Labview tech but i have not received an answer yet...
This is my problem..
I have a program that when a button is pressed, it initializes a can interface to CAN0 for example, then it writes... then it waits about 100mills and then it reads... My computer is connected to a simulator through the USB 8473 interface (I have the problem when I connect it to the hardware I am going to use), and everytime I write, this simulator sends a response... The problem is that sometimes I don't see a response... I have made sure that the simulator responds so I know it is responding... I have changed the waiting time before the read from 1 mills to 100 mills to 1 second, and still with the same result...
The way I have fixed this problem is by reading multiple times (3 times)... so every time I send a request, i wait 100 mills... then I read once, wait 25 mills, then read again, wait, then read again....
So, I wanted to know if anybody here has had to do this in order to get around this problem...???
The reason why I was asking this is because I also have another application that has to monitor my hardware by sending requests every 100 milliseconds... so I have two loops, once that writes requests every 100 mills... and another that reads the responses every 20 mills... but sometimes it looks like eventhough i read this many times, I still miss some frames, which are caught later but still not good enough...
I have posted a different thread about the above problem...
If you have questions just ask please...
Thanks

Yes, by Labview tech i meant NI Support... sorry about that...
I am still waiting for them on this subject...
I'll attach a simplified version of my code (the only difference between this code and the original is that i parse all the data that i get...)
I am attaching these if a couple replys...
Run the receive and respond (simulator) then run the CAN_PROBLEM vi... click on the OK button to write then read... you can tell it missed the message when the Frames to Read field is 0...
how are you sure that you device is sending a response?
Very sure... 100%... the original simulator lets me know when it sends the response...
Can you run bus monitor on another port, ie another USB-CAN device?
I did that, and the other USB-CAN gets it... the program I am running on the other computer is called CANyliser... I think that program waits until there is something in the queue (which I am not doing with mine)... I am just reading after I have wrote teh message (reading after about 100 mills I wrote)... So I am assuming that's plenty of time... i have increased this waiting time to 1 sec and still get the same behaviour...
Attachments:
CAN_PROBLEM.vi ‏16 KB
ReceiveAndRespond.vi ‏17 KB
CAN INIT.vi ‏23 KB

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