Ftdi read in LabVIEW

I am hoping for some assistance with reading data via a USB FTDI device. I am using the LabVIEW driver to attempt to read back data provided to me via a USB connection to a FTDI FT232HQ on a module connected to an Altera DE2-115 development board. The FPGA is currently sending packetized data every 1mS. I simply want to read the data back and parse the contents of the packets and display it in a graph. During the read in my LabVIEW code (see screen shot included), the data being collected seems to be corrupt or maybe overwritten. The data seems to repeat and only includes data in the fourth quadrant. If I open the D2XXtool.exe and run it on the same hardware and data, I can get clean data that represents the data I expect. I’m wondering what I am doing wrong in my read VI. The jpg file included here shows my LabVIEW source code and screen shots of my data and the D2XXtool data from a log file.
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FTDI_Read_Problem_LabVIEW.jpg ‏509 KB

If you are intending to use the FTDI chip to read/write an EEPROM I believe you need to use an I2C/EEPROM library (e.g. libmpsse dll?) to do this and not VISA Read/Write (VISA Read/Write does not mean EEPROM Read/Write). VISA Read/Write will just send serial data out of the FTDI cable and not I2C commands to read/write the EEPROM.
Unless the FTDI cable you have does something differently but when we have used FTDI leads to read/write EEPROMs in the past we have had to use an FTDI I2C -> EEPROM library.
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DAQ3.vi ‏36 KB

This sounds like Windows power management shutting off power to the USB HUB but you have any of the common problems in this FAQ article:
USB Plug-n-Play Devices (Windows)
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‎01-22-201202:20 PM
In this topic we will discuss some of the common problems that have been observed using USB devices with LabVIEW on Windows operating systems. Many of these points are also applicable to other environments but the examples will be use the Windows 7 OS.
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The details are :
NI Software : LabVIEW
Version : 5.0
OS : Windows 95
NI Hardware : N/A
Drivers : N/A
CPU : Pentium
RAM : 48
Vendor : darcom
Customer Information :
SPEL TESTING
SPEL, INDIA
[email protected]
Ph: (91) 4114 53818
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