[Kroupware] Kolab Clint Install Problem

[Muhammad Reza]

Hi All

 i have problem when installing kolab client in redhat-9.0

[root at reza kdenetwork-kroupware-1.0.1]# ./configure 
--snip--
checking for killpg in -lucb... no
checking for int... yes
checking size of int... 4
checking for long... yes
checking size of long... 4
checking for char *... yes
checking size of char *... 4
checking for char... yes
checking size of char... 1
checking for dlopen in -ldl... yes
checking for shl_unload in -ldld... no
checking for vsnprintf... yes
checking for snprintf... yes
checking for X... configure: error: Can't find X includes. Please check
your installation and add the correct paths!

what should i do ?

cheers
.:NewBie:.