Why will the printer only feed heavy card stock, not normal paper

Why will the printer only feed heavy card stock, not normal paper This is a pretty old printer but a new problem. It recently stopped feeding normal weight paper. It only feeds heavy card stock now. It was just grabbing a couple of sheets of paper, one on top of the other, and sending it through the machine as if it wasn't even noticing that it was there and then saying load paper and press go.
Asked by: Guest \| Views: 247

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bert [Entry]

This is a weird problem. There is one thing you can try and that is to see if there is a firmware update for the printer itself. The firmware update may fix this bug by over writing the old firmware.