Solve : Printer problem -cannot print envelopes?

1.	Solve : Printer problem -cannot print envelopes?
Answer» HP PSC1510 All-In-One. Bought HALLMARK card STUDIO 2008. Using Windows XP. Envelope printing states "mismatched paper" HP provided another driver, still doesn't work and Hallmark attempted to correct also Help!please check paper STATUS, that is you put A4 PROBLEM ll be solved..

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