Same problem here with Ethernut 1.3-G, Nut/OS 4.0.3 and ICCAVR 7.07. I guess there's an incompatibility with the initialization for 1.3G and compiler version 7.07. Please stay tuned, we are trying to solve this ASAP. Harald At 08:59 07.09.2006 -0400, you wrote: >"NutRegisterDevice(&DEV_ETHER, 0, 0);" call lock up there.