I have a problem with P1010 and Ethernet Communication. I configured a ring with 16 BDs. When I activate 1 BD to send data, nothing happens, just TBPTR0 jumps to the next BD. When the ring is full, all 0x8000-Bits are cleared and TBPTR0 jumps to 1. BD. The data is never send, also no error information in BD received. What could be the reason?