Hi,
What OS is installed in your computer?
Are you using the OS generic drivers for your printer or have you installed the specific Epson L555 drivers / software relevant to your computer's OS.
Here is a link to the Epson driver support page for your model printer. Select the appropriate OS by clicking on the arrowhead in the ''Filter content by operating system'' box on the left of the page.
http://esupport.epson-europe.com/ProductHome.aspx?lng=en-IE&data=0ccCGROWIYMbnTPOgBVU002Fw0W0vyz4X2l+5Xp99OeTsY4U003D&tc=6