AT91SAM7S64 OLIMEX P64 USB usb_control_msg write fails libusb-win32

Hallo zusammen,

vorher auf yahoo gepostet, von daher auf englisch:

Dear all,

I'm having problems with sending data FROM Host TO Device (OUT).

I extended the code can be found in the FreeRTOS distribution.
I can read data with control transfer, I can do write control transfer 
without
DATA STAGE.

My sequence:

PC: result = usb_control_msg(dev, USB_TYPE_VENDOR | USB_RECIP_DEVICE |
USB_ENDPOINT_OUT, 0x01, 0xAA55, 0xBB44, (char *)&ulUSBConfig, 0x08, 
5000);

SAM7:

1)
ISR -> RXSETUP (device sends ACK after clearing flag)

2)
USBSample -> Gets the messages, does nothing as not necessary.

3)
ISR -> RXDATA (data payload received as awaited)

4)
USBSample -> prvProcessEndPoint0Interrupt() processes the message, sends 
then
prvUSBTransmitNull() as ACK

5)
USBSample -> prvProcessEndPoint0Interrupt() does AT91C_UDP_TXCOMP

Actually I have the data in the SAM7 sent by the PC.
Still I have TIMEOUT (-116) with libusb-win32.

Any idea?

Thanks for the help.



Also, weiß jemand, was man nach prvUSBTransmitNull & TXCOMP bei Control 
Transfer machen muss?

Grüße
dg