IE 6 just stops responding

IE 6 just stops responding

our website is working fine in all browsers except in IE 6 when it just
stops responding immediately upon login. Since this version does not have
debugger tool, it is difficult to debug this problem
Here are some pointers
1) did a view source and checked that the code was approximately of 8000
lines
2) we are using jquery v 1.7.1 and there are many references to the use of
.live() method in the javascript code.
If I change .live() to .on() as it is deprecated in v1.7, would that make
any difference or any other thing in mind which would help me analyze the
issue