Now, more problems tonight with electronic voting. Just two weeks before Election Day, the state of Maryland had a disastrous primary. Equipment failed. Election judges didn't have a clue how to handle the new brand of e-voting machines.

The electronic machines have to stay, but now poll workers are being sent back to school.

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UNIDENTIFIED MALE: Just put that initial there.

PILGRIM (voice over): Election judges in Baltimore, Maryland, volunteer, and then they have to take a class.

UNIDENTIFIED MALE: I will not need a store without a receipt.

PILGRIM: The Schaefer Center at the University of Baltimore has trained 5,000 judges.

UNIDENTIFIED FEMALE: Once it fits comfortably and the light turns solid green, stop.

PILGRIM: All the election judges, even if they served before, are being trained. And Baltimore is also recruiting hundreds more to help.

For the September primary, poll workers showed up late. Some didn't show up at all. And many had no clue how to operate the new electronic machines. Election officials say some poll workers hadn't even seen the machines until Election Day.

EDWARD HAILES, ADVANCEMENT PROJECT: Sometimes they're referred to as the weakest link in our democracy. But everyone acknowledges that they are the background of our democracy, and we need sufficient numbers of well-trained poll workers available on Election Day to prevent any potential train wrecks.

PILGRIM: The course includes training on these problematic electronic poll books. After classes election workers know how to check in voters and process votes.

JOHN WILLIS, UNIVERSITY OF BALTIMORE: It's a very hard task, particularly when you change systems. We just shouldn't be doing this three weeks before the election. We need to start this process well before the election. It's an administrative management problem.

PILGRIM: Baltimore has scheduled more than 80 classes running up to two or three days before the election. The president of the Baltimore Board of Elections says the new equipment had him concerned from the beginning.

ARMSTEAD JONES, PRESIDENT, BALTIMORE ELECTION BOARD: I had anticipated the issues. First of all, Baltimore city was never in favor of getting the Diebold equipment. We fought that issue for two years. And then, of course, mandated by law, the state had the unified system, and we finally had to come on board.

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PILGRIM: Now, botched elections with electronic voting machines are often blamed on the poll workers. Voting machine companies defend their technology and blame problems on human error. Now, Baltimore officials say, after these classes, if the technology fails, manufacturers won't be able to blame the poll workers anymore.