Hello All, This is my third freshly installed and updated CentOS 5.1 with installed Digium 4-port Analog card and while compiling Zaptel I am getting this error. If I run "./install_preq test" and "./install_preq install" it says "Install Successfully". Error ==== CC [M] /usr/src/zaptel-1.4.11/kernel/wcte12xp/../voicebus.o LD [M] /usr/src/zaptel-1.4.11/kernel/wcte12xp/wcte12xp.o CC [M] /usr/src/zaptel-1.4.11/kernel/xpp/card_fxo.o In file included from /usr/src/zaptel-1.4.11/kernel/xpp/xpd.h:26, from /usr/src/zaptel-1.4.11/kernel/xpp/card_fxo.c:27: /usr/src/zaptel-1.4.11/kernel/xpp/xdefs.h:117: error: conflicting types for ?bool? include/linux/types.h:36: error: previous declaration of ?bool? was here make[4]: *** [/usr/src/zaptel-1.4.11/kernel/xpp/card_fxo.o] Error 1 make[3]: *** [/usr/src/zaptel-1.4.11/kernel/xpp] Error 2 make[2]: *** [_module_/usr/src/zaptel-1.4.11/kernel] Error 2 make[2]: Leaving directory `/usr/src/kernels/2.6.18-92.1.6.el5-i686' make[1]: *** [modules] Error 2 make[1]: Leaving directory `/usr/src/zaptel-1.4.11' make: *** [all] Error 2 [root at faxgw zaptel-1.4.11]# Can anyone help... Cheers, Nitesh