fakewap error

i use kannel-1.2.0 to test the wap ability ,every
20 seconds  execute ./fakewap -m 500 -c 100 file://192.168.6.151, but the linux system crash even if 30 seconds or 60 seconds.
in the source code remark say "When data is freed, it is overwritten with 0xdeadbeef, so that code that tries to use it after freeing will likely crash.  The freed area is kept around for a while, to see if anything tries to write to it
  after it's been freed."
please help me!
                             lijl