Testbench failures for Opencores Ethernet mac

Hello,

I'm fairly new to this - just got started running the testbench for the
Opencores Ethernet core. I'm using Modelsim SE64 Plus 6.0b in a Solaris
5.10 environment.

I get a few test failures when running the testbench:


Heading: MIIM MODULE TEST

At time:              8991769
Test: TEST 10: SLIDING STOP SCAN COMMAND IMMEDIATELY AFTER WRITE
REQUEST ( WITH AND WITHOUT PREAMBLE )
*FAILED* because
Data was not correctly written into OR read from PHY register -
control register

*****************************************************
Heading: MAC HALF DUPLEX FLOW TEST

At time:            483196167
    Test: TEST 0: DEFER, COLL. AND LATE COLL. WHILE TRANSMITTING AND
RECEIVING FRM. AT 4 TX/RX BD ( 10Mbps )
    *FAILED* because
    Transmit should NOT start more than 1 CLK after CarrierSense and
causing Collision

At time:            484976407
    Test: TEST 1: DEFER, COLL. AND LATE COLL. WHILE TRANSMITTING AND
RECEIVING FRM. AT 4 TX/RX BD ( 100Mbps )
    *FAILED* because
    Transmit should NOT start more than 1 CLK after CarrierSense and
causing Collision

 At time:            955522987
    Test: TEST 1: DEFER, COLL. AND LATE COLL. WHILE TRANSMITTING AND
RECEIVING FRM. AT 4 TX/RX BD ( 100Mbps )
    *FAILED* because
    Transmit should NOT start more than 1 CLK after CarrierSense and
causing Collision

The above tests also failed a number of times for other reasons,  so I
was wondering if I was missing anything. I checked the opencores
forums, and it seemed like someone had similar problems, but there were
no answers to that thread. I also ran it on an earlier version of
Modelsim and got the same failures. I don't know if I perhaps didn't
configure something correctly?

Thanks.

Pei