uClinux using Nios II e-core

hello ，i am trying to transplant the uclinux to my cyclone IV ， i found a detail description about uClinux on Altera Wiki page， but i encountered several problems as follows:

1>my environment is ubuntu 12.04 - 64bit ，i cannot success to configure my toolchain (prebuild toolchain nios2gcc-20080203.tar.bz2 )PATH right：i add this line in ~/.profile：PATH=/opt/nios2/bin:$PATH;export . but nios2-linux-uclibc-gcc -v failed； then i chose to use ubuntu 11.04 32-bit ,it works;

so, what is your linux version ?

2>I cannot download http://sopc.et.ntust.edu.tw/pub/linux/nios2-linux-20100621.tar ，it seems the link is out of work;

so i use ftp://ftp.altera.com/outgoing/nios2-linux/20120802/ instead ; but when i come into uclinux-dist:# make menuconfig ,it failed;said that :

Are you do your job as the same as Wiki page do ??

now ，i cannot make any progress ，