ASSERTION after installing IMSAMP

Hi all,
I am using the IMSAMP, Microsofts intermediate driver sample. I am curious
to know what causes an ASSERT in efilter.c after installing the sample.
The function that asserts seems to be
EthFilterDprIndicateReceivePacket(…).
Dbg Message…

*** Assertion failed: MINIPORT_LOCK_ACQUIRED(Miniport)
*** Source File: w:\nt\private\ntos\ndis\ndis40\mp..\efilter.c, line 2113

Has anyone encountered the same message or know what causes it.
Thanks.

Hello averyone !
Can anybody tell me, how to port imsamp to Win98 ?
I can compile it under Win98, but how can I install it ?
Where can I get .inf file to install imsamp under Win98 ?

Best regards,
jenson mailto:xxxxx@beep.ru