Did you get a disc of scanner software with the scanner, Bob? If not, you should download the software from the epson site:

http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes&infoType=Downloads&oid=72343&prodoid=63059195&category=Products

This will allow you to adjust all the parameters in the scanning process, including the resolution.