Infinite Loop?

I modified the call to createControlFile in mls_viele.php to only get '3' listings instead of '1000' for testing purposes. I then ran the extract and find that it never finishes. I check Viele's 'images' folder and see that the same two images are being written over-and-over again (maybe one of the three has no image). I check Viele's 'text' folder and find that the download.xml file is being written and deleted over-and-over again with the same three listings each time. Drupal does not report anything conclusive. The last few lines of Viele's runtime.log:

[January 19, 2009 21:56:21 PST] OPENING socket on rets.flexmls.com
[January 19, 2009 21:56:21 PST] SUCCESS on open
[January 19, 2009 21:56:21 PST] RESPONSE ...
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Cache-Control: private
RETS-Version: RETS/1.5
Content-Type: text/xml
Content-Length: 83
Date: Tue, 20 Jan 2009 05:56:24 GMT
[January 19, 2009 21:56:21 PST] READING the PAYLOAD with Content-Length
[January 19, 2009 21:56:21 PST] PAYLOAD ...
<RETS ReplyText="Logout Successful" ReplyCode="0">
SignOffMessage=Good Bye</RETS>

[January 19, 2009 21:56:21 PST] INTERPRET the PAYLOAD as XML through parsing