Concurrent Scrape: Out of memory

I'm having memory problems when running concurrent scrapes.

Here is my set up.
win 7
4 gig ram
quad 2.6ghz
1 gig max memory allocation in screen scraper

I'm invoking screen scraper via java.

Java side:
Read input from file and save it to list. Close stream.

//loops for around 50 keywords
//this spawns 50 scrapes
for (String keyword : keyList)
{
try
{
RemoteScrapingSession remoteScrapingSession = new RemoteScrapingSession("TEST");
remoteScrapingSession.setVariable("KEYWORD", keyword );

remoteScrapingSession.setDoLazyScrape( true );
remoteScrapingSession.scrape();

}
finally
{
// Be sure to disconnect from the server.
remoteScrapingSession.disconnect();
}
}

On the screen scraper side:
Before scraping session begins:
Initialize csv stream and save it go a session variable
Initialize a few session variables
Read input from a file and save contents to list. Close stream.

First Scrapeable Page:
for loop to invoke product page

Product scrapeable page:
for loop to invoke details page

Details scrapeable page:
scrape contents, write them out to csv

Always at the end:
Script to close writer stream and clear all session variables.

When I run the java file through eclipse and monitor the memory usage on the web interface, it goes to 100% very fast. At 100% it is able to run for a while, then I get a out of heap memory error. It is not the 50 concurrent scrape, as I've tried with just a couple and it does the same thing. There is a memory leak somewhere. I'm not sure if I'm using the remotescraping correctly.

I'm exiting eclipse after I run the java program. Does this matter?

Any help is appreciated.