OpenCores MAC driver error mesages

Hello!

Im using a custom board with a KS8721BT chip. It have not any initialization so in the eth_ocm_phy_init() function i'm reseting it and waiting for auto negoriation to complete.

Apparently everything it's ok, I have the following log in the program:

=============== Software License Reminder ================

This software project uses an unlicensed version of the NicheStack TCP/IP

Network Stack - Nios II Edition. If you want to ship resulting object

code in your product, you must purchase a license for this software from

Altera. For information go to: "http://www.altera.com/nichestack"

=====================================================

InterNiche Portable TCP/IP, v3.1

Copyright 1996-2008 by InterNiche Technologies. All rights reserved.

eth_ocm_prep

Your Ethernet MAC address is 2a:52:61:75:6c:2a

Static IP Address is 192.168.1.18

prepped 1 interface, initializing...

[eth_ocm_init]

[eth_ocm_phy_init] PHY ID 0x1f 22 1619

[eth_ocm_phy_init] Found KS8721B/BT PHY

[eth_ocm_phy_init] KS8721B/BT Auto-neg capabilities: 0x1e1

[eth_ocm_phy_init] LXT972A not found!

[eth_ocm_phy_init] Marvell 88E1111 PHY not found!

[eth_ocm_phy_init] DP83848C PHY not found!

[eth_ocm_phy_init] Waiting on PHY link...OK. x=11164, PHY STATUS=786d

[eth_ocm_phy_init] Full Duplex is 1

[eth_ocm_init] Configuring MAC address 2a:52:61:75:6c:2a

Opencores MAC post-init: MODER = 0x0000a403

mctest init called

IP address of et1 : 192.168.1.18

Created "Inet main" task (Prio: 2)

Created "clock tick" task (Prio: 3)

Simple Socket Server starting up

[sss_task] Simple Socket Server listening on port 30

Created "simple socket server" task (Prio: 4)

But after a moment I have the next messages:

Frame dropped: too busy to receive

Frame dropped: too busy to receive

Frame dropped: too busy to receive

Frame dropped: too busy to receive

Frame dropped: too busy to receive

...(for ever!)

Any idea why this happen? I'm using a static IP, no DHCP enable in the Niche Stack.