Null Reference exception

hi everyone,

i'm developing 2 applications that can communicate to each other. application1 is using a tcp socket to send a message
to application2. application2 should receive the message through its webservice. now, my problem is i'm not getting the
message in application2. i tried running ethereal to check the packets and i can see that the message is going to the
computer where application2 is running but i'm getting a Null reference exception on application2. i tried using stacktrace
but it's only giving me the line where the null reference occured no further information. so, i need advise what's going on.
why am i not getting the message from the application? i have been working on this problem for a week now. so, please advice.
thanks.