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In the Printers dialog box, choose your printer from the list of installed printers.
Click the Connect button; the Connect dialog box appears.
Change your port connection from LPTx to LPTx.DOS (where x is 1, 2, or 3).
Click OK.
Note: Also, refer to for instructions on fixing timeout problems.
In the menu that appears, select Settings.
In the next menu, select Printers; the Printers window appears.
Click on your printer's icon and select Properties from the File menu.
Click the Details tab.
Click Add Port.
Click Other.
Make sure Local Port is highlighted, then click OK.
Type LPTx.DOS (where x is 1, 2, or 3).
In the Details tab, the Print to the following port should be LPT.DOS (unknown local port).