DDC264EVM: Cannot get anything using stdcall XferINTDataIn

Dear TI,
Below is an excerpt of my program
'Initialize DDC Regs
'0000, 0000, 1100, 1200, 1C<DDCHighReg>, 1D<DDCLowReg>, 1F01, 0000, 0000, 1E01
Result=Result+XferINTDataOut1(0)
Result=Result+XferINTDataOut1(0)
Result=Result+XferINTDataOut1(&H1100)
Result=Result+XferINTDataOut1(&H1200)
Result=Result+XferINTDataOut1(1C<DDCHighReg>)
Result=Result+XferINTDataOut1(1D<DDCLowReg>)
Result=Result+XferINTDataOut1(&H1F01)
Result=Result+XferINTDataOut1(0)
Result=Result+XferINTDataOut1(0)
Result=Result+XferINTDataOut1(&H1E01)
'Initialize DDCIN Array to &H5A
for I=0 to 4096
DDCIn(I)=&H5A
Next I
Result=XferIntDataIn(0,DDCIn(0),512)
If Result <>0 then
Exit Function
End If
Str=""
For I=0 to 4096
Str=Str+Hex(DDCIn(I))+vbcrlf
Next I
Call WriteToFile(True, "DDCIn.csv", Str)

Public Function XferINTDataOut1(Byref RegData as Long) As Integer
Dim I(0 to 3) As Integer, Str As String, MyLen as Integer
Str=Hex(RegData)
If Len(Str)<4 Then Str=String(4-Len(Str),"0)+Str
I(0)=Hex2Int(Mid(Str, 1, 1))
I(1)=Hex2Int(Mid(Str, 2, 1))
I(2)=Hex2Int(Mid(Str, 3, 1))
I(3)=Hex2Int(Mid(Str, 4, 1))
XferINTDataOut1=CInt(XferINTDataOut(0, I(0), I(1), I(2), I(3)))
End Function

Romeo,
It's been a while since I've looked at this, but I'll see if I can help. I see you're calling functions from the usb_io...dll file, but where are you getting your code example from? I don't think that we ever released a opcode map or sample code or anything, so I'm concerned that you might be missing steps in terms of what data is being transferred to the FPGA and what data is being transfered through the FPGA to the DDC.