fucntion makes rest of form freeze

[DaBomb]

I have a program that connects to an IRC chat server using asynch functions to connect, receive, and send. It works fine and receives everything until I use a function to parse the incoming message. Normally the program raises the event recvd, and the function that handles it adds the message to the output textbox.
However, when I turn parsing on, after one message is received, it parses it and stops. Nothing else comes in or gets parsed, and the message box that should show the incoming message never comes up.