[Click] problems with router ipv6

[Max Ponce]

Hi everyone 
I'm a student, I'm a new click user.
I'm currently running Click in USERLEVEL 

I was trying to compile click-1.4 as a kernel module for RedHat 9.0, 
linux kernel-2.4.20-8. 
I patched it with the linux-patch-2.4.20 in the source of the 
click-1.4. 

I'm implementation a router IPv6 based on Click 
When I run the configuration, I have following problem:

[root at Max-Ponce click-1.4pre1]# userlevel/click < xtest/6router.click
<stdin>:175: unknown element class 'CheckIP6Header'
<stdin>:178: unknown element class 'DecIP6HLIM'
<stdin>:179: unknown element class 'GetIP6Address'
<stdin>:180: unknown element class 'LookupIP6Route'
[root at Max-Ponce click-1.4pre1]#
 
When I run the configuration of router ipv4 it's ok,

I hope you guys respond soon
Thank you all.  
Max Ponce

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