[phpGroupWare-users] Cannot modify header information

[udhaya]

i try to change the header inc .php file , i got the following error, 

Notice: Use of undefined constant MCRYPT_TRIPLEDES - assumed 'MCRYPT_TRIPLEDES' 
in D:\Program Files\Apache Software  
Foundation\Apache2.2\htdocs\phpgroupware\phpgwapi\inc\common_functions .inc.php 
on line 532

Notice: Use of undefined constant MCRYPT_MODE_CBC - assumed 'MCRYPT_MODE_CBC' 
in D:\Program Files\Apache Software  
Foundation\Apache2.2\htdocs\phpgroupware\phpgwapi\inc\common_functions .inc.php 
on line 532

Warning: Cannot modify header information - headers already sent by (output 
started at D:\Program Files\Apache Software  
Foundation\Apache2.2\htdocs\phpgroupware\phpgwapi\inc\common_functions 
.inc.php:532) in D:\Program Files\Apache Software  
Foundation\Apache2.2\htdocs\phpgroupware\phpgwapi\inc\class.phpgw.inc. php on 
line 152


i need some help to solve this 

thanks Sent from the phpGroupWare forums @ http://forums.phpGroupWare.org