SubmitUrb出错,怎搞

使用DriverStudio生成的代码
只有Bulk传输
读写时都死机
用SoftIce跟踪发现问题出在SubmitUrb上
请问高手怎搞

工作环境：win2k

下面是写操作的代码

NTSTATUS Dirver6Device::Write(KIrp I)
{
t << \"Entering Dirver6Device::Write, \" << I << EOL;
// TODO: Check the incoming request.  Replace \"FALSE\" in the following
// line with a check that returns TRUE if the request is not valid.
    if (FALSE)
{
// Invalid parameter in the Write request
I.Information() = 0;
return I.PnpComplete(this, STATUS_INVALID_PARAMETER);
}

// Always ok to write 0 elements.
if (I.WriteSize() == 0)
{
I.Information() = 0;
return I.PnpComplete(this, STATUS_SUCCESS);
}
ULONG dwTotalSize = I.WriteSize(CURRENT);
ULONG dwMaxSize = m_Endpoint2OUT.MaximumTransferSize();

// If the total requested read size is greater than the Maximum Transfer
// Size for the Pipe, request to read only the Maximum Transfer Size since
// the bus driver will fail an URB with a TransferBufferLength of greater
// than the Maximum Transfer Size.
if (dwTotalSize > dwMaxSize)
{
ASSERT(dwMaxSize);
dwTotalSize = dwMaxSize;
}

// Declare a memory object
KMemory Mem(I.Mdl());

// Allocate a new context structure for Irp completion
USB_COMPLETION_INFO* pCompInfo = new (NonPagedPool) USB_COMPLETION_INFO;
if (pCompInfo == NULL)
{
I.Information() = 0;
return I.PnpComplete(this, STATUS_INSUFFICIENT_RESOURCES);
}

// TODO: Select the correct pipe to write to

// Create an URB to do actual Bulk write to the pipe
PURB pUrb = m_Endpoint2OUT.BuildBulkTransfer(
Mem,          // Where is data coming from?
dwTotalSize,  // How much data to read?
FALSE,        // direction (FALSE = OUT)
NULL  // Link to next URB
);        

if (pUrb == NULL)
{
delete pCompInfo;
I.Information() = 0;
return I.PnpComplete(this, STATUS_INSUFFICIENT_RESOURCES);
}

// Initialize context structure
pCompInfo->m_pClass = this;
pCompInfo->m_pUrb = pUrb;

    // Submit the URB to our USB device
NTSTATUS status;
status = m_Endpoint2OUT.SubmitUrb(I, pUrb, LinkTo(WriteComplete), pCompInfo, 0);
return status;
}

用仿真看一下，设备到底收到了多少数据，是否出现丢数据的现象。

谢谢先
确实没有数据丢失
我现在在DS生成代码的时候选用ClassGUID就不死机了
以前是openbyname
（这是怎么一回事，有高手知道顺便告知）
但是新问题是只能实现写功能
读操作时
IN07IRQ的相应位也没有置一
请指点

DS2.5 2.6的BUG！

问题解决了
换了ds2.7果然就好了
谢谢
如何给分？