How to install app_valetparking?

Hello.
I-m having trouble installing the app_valetparking.
I-m using de demo version of Multitenant.
OS : Centos 5.4 (Final)
Asterisk : Asterisk 1.6.1.19

I downloaded the app_valetparking.c from : http://www.freeswitch.org/asterisk_stuff/app_valetparking.c

and in the asterisk source directory i put the app_valetparking.c

/usr/src/asterisk-1.6.1.19/apps

then i made make and i got a LOT of errors...
is the app_valetparking.c build for a particular version of asterisk?

Here are some part of the errors reported in console :

[root@thirdlane asterisk-1.6.1.19]# make
[CC] app_valetparking.c -> app_valetparking.o
In file included from /usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:59,
from app_valetparking.c:27:
/usr/src/asterisk-1.6.1.19/include/asterisk/time.h: In function ‘ast_tvnow’:
/usr/src/asterisk-1.6.1.19/include/asterisk/time.h:134: warning: implicit declaration of function ‘gettimeofday’
In file included from /usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:61,
from app_valetparking.c:27:
/usr/src/asterisk-1.6.1.19/include/asterisk/logger.h: At top level:
/usr/src/asterisk-1.6.1.19/include/asterisk/logger.h:81: error: expected declaration specifiers or ‘...’ before ‘va_list’
/usr/src/asterisk-1.6.1.19/include/asterisk/logger.h:87: warning: no previous prototype for ‘ast_register_verbose’
/usr/src/asterisk-1.6.1.19/include/asterisk/logger.h: In function ‘ast_register_verbose’:
/usr/src/asterisk-1.6.1.19/include/asterisk/logger.h:87: error: expected declaration specifiers before ‘attribute_warn_unused_result’
/usr/src/asterisk-1.6.1.19/include/asterisk/logger.h:88: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘attribute_warn_unused_result’
In file included from app_valetparking.c:27:
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1681: error: storage class specified for parameter ‘ast_mutex_t’
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1688: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1703: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1708: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1713: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1718: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1723: error: storage class specified for parameter ‘ast_cond_t’
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1725: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1730: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1735: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1740: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1745: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1750: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1756: error: storage class specified for parameter ‘ast_rwlock_t’
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1766: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1782: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1787: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1792: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1797: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1818: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1823: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1828: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1851: error: expected ‘)’ before ‘*’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:1982: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
/usr/src/asterisk-1.6.1.19/include/asterisk/lock.h:2017: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
In file included from /usr/src/asterisk-1.6.1.19/include/asterisk/utils.h:26,
from app_valetparking.c:28:

Can someone help me here?

Thanks
Ricardo.