ipv6 kernel panic

[Tesi TLC (G. MazzinI)]

Hello ! 

We are two students of Italian University !
We work with 2 pc (named : ing209 and ing216) over ATM network (IBM 8285
switch and turboways 25 pci card) with LAN emulation !
We use linux RedHat 5.2 kernel 2.1.126 with modutils 2.1.121 and
glibc2.0.7.
We would to install ipv6 on our linux machines.
We are using the Bieriger's HOWTO !    
On ing209 and ing216 we compiled inet6-apps0.34 and 
telnet.95.10.23.NE+ipv6-3 without problems (in apparence)

On ing209 we installed net-tools1.50 (with glibc2.0.7)
On ing216 we installed net-tools1.49 (with glibc2.1.111 rpm) and
we configutated interface (in ing216) in this way :

lec0   Link encap:Ethernet   HWaddr  00:04:ac:6c:e8:5c
       inet addr:xxx.xxx.xxx.216  Bcast:xxx.xxx.xxx.255 Mask:255.255.255.0
       inet6 addr: fe80::204:acff:fe6c:e85c/10 Scope:Link
       UP BROADCAST RUNNING MULTICAST    MTU:1500  Metric:1
       RX packets ...............
       TX packets ............
       collision..............

lo     Link encap:Local Loopback
       inet addr:127.000.000.1  Mask:255.0.0.0
       inet6 addr:  ::1/128  Scope:Host
       UP LOOPBACK RUNNING  MTU:3924    METRIC:1
       RX packets.................
       TX packets.................
       collision .............

When we do (from ing216 to ing216) :
ping fe80::204:acff:fe6c:e85c
we haven't problem !

When we do (from ing209 to ing216) :
ping fe80::204:acff:fe6c:e85c

ing216 goes in kernel panic :-((((   !
  
Does anyone knows this problem ?
It happens because we work over ATM LAN emulation or other ?

Thanks

Luca & Giancarlo