DW CS3 freezes on opening a file

Question

I have a site that has 110 cfm files in the root, 14 cfc
files in the "components" directory, and less than 10 each of
images, CSS, Spry, and js files in their own directories. Of all
these files, which I have been editing since April, there is ONE
file that makes DW crash. It can happen immediately when I try to
open the file, or if I try to do code-folding by highlighting with
the mouse instead of the cursor, or any other I don't know what.
The thing is, it didn't always do this. This file started making DW
freeze sometime within the last month or so.
I tried deleting and re-creating the file, didn't work. I
tried doing the preferences thing, didn't work. I haven't found any
other solution from this site or by Googling. I am using WinXP Pro
SP2, DW CS3, CF 8. I had to install CF8 because of a problem with
CF7, and I'm pretty sure that may have something to do with this
and with DW not recognizing the data source I've set up using the
Admin page.
Does anyone have any idea about this?
Thanks!

Answer 1

Another note: Here's the code that's freezing DW:
<cflock name="add_person" timeout="5">
<cftransaction>
<cfif isDefined("session.person_id")>
<cfif session.person_id NEQ "">
<cfinvoke component="root_dir.components.person_queries"
method="getUpdate_person"
returnvariable="update_person">
<!--- CFC Query --->
<cfinvokeargument name="person_id"
value="#session.person_id#">
<cfinvokeargument name="first"
value="#session.first#">
<cfinvokeargument name="last" value="#session.last#">
</cfinvoke>
<cfset variables.person = session.person_ID>
<cfelse>
<cfinvoke component="root_dir.components.person_queries"
method="getAdd_person"
returnvariable="add_person">
<!--- CFC Query --->
<cfinvokeargument name="first"
value="#session.first#">
<cfinvokeargument name="last" value="#session.last#">
</cfinvoke>
<cfinvoke component="root_dir.components.person_queries"
method="getGet_per_id"
returnvariable="get_per_id">
<!--- CFC Query --->
</cfinvoke>
<cfset variables.person = get_per_id.MAX_PEOPLE_ID>
</cfif>
</cfif>
</cftransaction>
</cflock>
I don't know why this is happening now, all of a sudden.