problems with arm-elf-as

I'm new to programming and using make files so this may be an
rudimentary question.  I'm using Eclipse on Mac OS X (leopard and Tiger)
and cannot get my projects to compile.  When I use a terminal and 'make'
a binary is generated.  However in eclipse (which runs make on the same
makefile) I get the following error:

assemble startup.asm to generate startup.lst and startup.obj ...
make: arm-elf-as: Command not found
make: *** [startup.obj] Error 127

Is 'arm-elf-as' not the correct assembler?  I don't understand why it
doesn't work in eclipse because the toolchain seems to work when I run
make manually.  The command exists in the same directory as arm-elf-gcc
and the rest of the toolchain and the path is added as well.


Any suggestions are appreciated,
-Shawn