[Asterisk-Users] Problems patching Makefile in apps directory

[PBX Portela]

Dear Friends,

I'm trying to install the spandsp in my Asterisk box, in order to use
rxfax and txfax.
Well,  following the instruccions i try to patch the Makefile within the
asterisk/apps source directory and found the following error message

[root at server apps]# patch < Makefile.patch
patching file Makefile
Hunk #1 FAILED at 35.
Hunk #2 FAILED at 68.
2 out of 2 hunks FAILED -- saving rejects to file Makefile.rej

May you help me?

Thank you in advance.
Juanjo