.ins file causes hang

I have a Automatic Configuration Script in use with several machines on my network. On a select few machines, when I have the script enabled, IE hangs for several minutes with "Detecting Proxy Settings"
I do not have any auto-configuration for the proxy set
Automatically Detect Settings is not checked

I've tried recreating the file and still have the same problem.
All these machines have been cloned with each other using Novell ZenWorks. All software, updates, and hardware are the same. (Dell Optiplex GX520)

Any ideas on how to tackle this is most appreciative.

Also, just FYI, I am using the latest IEAK 6, the PCs have the last version of IE 6.