[cpia] client probs

[Bastian]

I use the creative webcam II, kernel 2.2.13, reflection x as xserver on win98
to connect to my linux box.
bringing up the modules works fine :
-------------
Linux video capture interface: v1.00
V4L-Driver for Vision CPiA based cameras v0.7.1
Parallel port driver for Vision CPiA based cameras v0.7.1
   using PIO mode
cpia.c(49960):goto_low_power(2280):camera now in LOW power state
cpia.c(49968):goto_high_power(2268):camera now in HIGH power state
cpia.c(49980):dispatch_commands(2023):1 1 0 0 1 1 1 1
cpia.c(49980):dispatch_commands(2024):0 1 1 1 1 1 0 1
cpia.c(49984):save_camera_state(2300):0/0/185/0/220/214/214/230
cpia.c(49984):save_camera_state(2304):32/6/92
   CPiA Version: 1.02 (1.0)
   CPiA PnP-ID: 0553:0001:0100
   VP-Version: 1.0 0100
   1 camera(s) found
-------------

but when i try to start a client (xawtv, gqcam) i always get a segmentation 
fault.
dmesg says :

-------------
Unable to handle kernel NULL pointer dereference at virtual address 0000000c
current->tss.cr3 = 03537000, %cr3 = 03537000
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c58640b3>]
EFLAGS: 00010212
eax: 00000000   ebx: 00032000   ecx: c3538000   edx: 00000316
esi: c58dd000   edi: c58dd000   ebp: 0000001f   esp: c3539f2c
ds: 0018   es: 0018   ss: 0018
Process vidcat (pid: 582, process nr: 45, stackpage=c3539000)
Stack: c5862540 c3612e00 c586ba94 00031ba5 c3311eb0 00000000 c586217f c3311eb0
        00000000 00000000 c3648840 c34deff0 00000051 00000000 000000ff 
c01c017c
        c01e77e0 c01271cf c34deff0 c3648840 c3648840 00000000 c34deff0 
c0125fa4
Call Trace: [<c5862540>] [<c586ba94>] [<c586217f>] [<c01c017c>] 
[<c01271cf>] [<c
0125fa4>] [<c012619a>]
        [<c0107a2c>]
Code: 8b 40 0c 8b 14 90 85 d2 74 3b 81 e2 00 f0 ff ff 89 f8 c1 e8
-------------

what could it be ??

Bastian