If you are using a printer not traditionally used for film output you may incur some issue with the printer recognizing the film.
What is happening is that the optical eye is not seeing the film as it passes through the printer, hence the printer either doesn't pull the film through or stops printing with a printer jam error.
You can either get a printer that is used for film output such as the Epson 50, 1110, 1400, 1800, 1900, 2400, 4000, 4800, 4880, 4900. These Epson Models all have proven track records with film output capabilities.
If getting a new printer is out of budget you can tape your film to a plain piece of paper and feed it through that way. This way the optical eye can see the sheet coming through.
You can also try and create an edge on the film by either putting a piece of opaque tape and black line for the optical sensors to pick up the sheet. This may not always work as the printer may stop printing part way through and give a paper jam error.