You should copy the pre-compiled code into your local working directory. Follow the steps below:
mkdir /kumquat/users/${USER}/DA (your main working directory)
cd /kumquat/users/${USER}/DA
cp /kumquat/wrfhelp/PRE_COMPILED/WRFDA/WRFDA_compiled.tar.gz .
tar -xzf WRFDA_compiled.tar.gz
This will generate the WRFDA directory containing the compiled WRFDA code. This WRFDA package is pre-compiled to run in parallel (dmpar) mode using the GNU compiler (gfortran/gcc 4.9.2). It was compiled with the 4DVAR capability, and so can be run for both 3DVAR and 4DVAR exercises