how to crack MD5 middle with MASK attacking mode?

[atom]

it works fine on oclHashcat:

root@sf:~/oclHashcat-1.32# ./oclHashcat64.bin -m 5100 df2ef9d7b1db24f7 -a 3 EfEVp5953R -d 1 --quiet
df2ef9d7b1db24f7:EfEVp5953R
root@sf:~/oclHashcat-1.32# ./oclHashcat64.bin -m 5100 40030674df2ef9d7 -a 3 EfEVp5953R -d 1 --quiet
40030674df2ef9d7:EfEVp5953R
root@sf:~/oclHashcat-1.32# ./oclHashcat64.bin -m 5100 b1db24f7416abeee -a 3 EfEVp5953R -d 1 --quiet
b1db24f7416abeee:EfEVp5953R

if this does not work for hashcat cpu, please open up a trac ticket