Interop with .Net

[Mir Shafiqul Islam]

I am trying to get a .Net (in C#) interoperate with axis and wss4j. I am 
using Username token with digested password. However when I invoke the 
service from windows side I am getting error: Did not understand 
"MustUnderstand" headers. The same method invoked by the java client 
works fine. This is my first time playing with .Net so I maybe missing 
something obvious. If anyone has client implementation on .Net side 
interoping with axis/wss4j please let me know.

Thanks
Mir
System:
server: Wss4j (latest from cvs as of 6/2/2005) + axis 1.2RC3  + jdk 
1.4.2 on MacOSX
client: Windows XP + WSE 2.0 + VS .NET 2003