Oddities of Tkinter

[Tuvas]

I am building a tkinter program. A part of this program is to read data
from an incoming interface, and depending on the data, will display a
bit of text on the tk dialog, it decodes this data, so to speak. If one
command is sent, everything's just fine. When multiple are sent, the
program will stop responding, and will only continue to respond after
one types <ctrl>-c. The statement at fault is something like this.

e1=StringVar()
Label (master,textvariable=e1, width=32).grid(row=44, column=4)

def disp_mes1(text):
  e1.set(text)

It's the line 31.set(text) that takes so long when there's other
processes running. I've ran this program sucessfully many times on
another computer, however, when transfering to another with the same
OS, this problem was created. Any ideas as to what I might be able to
do to fix this problem? My main code is hopelessly complex to post the
entire thing, and I can't recreated the same structure with smaller
ammounts of code. Thanks for the help!