Problem with LXT970

[Eug]

Dear Sirs!

We have developed the board with LXT970AQC
and have the following problem:

At power on autonegotiation switches to 10 Mbps
while I have 100 Mbps hub and 100 Mbps Ethernet
at PC. At 10 Mbps all is OK. But when I force
chip to work in 100 Mbps mode I get RX_CLK low.
All LEDs are off except "100 Mbps" inspite of
intensive traffic. No data can be sent to the
network and no data can be received.

In the same time I have a connection to network
at PC when the board is connected directly to PC,
and the LED on hub is on when I connect the
board to the hub. And the data at ethernet line
seems to be OK.

What can be the problem?

All the best,
Eugene Fedunin
RDC Reagent