Printer driver Problem

we have wipro LQ2090 & TVSE 345 DMP{24 pin} both have there driver Cd’s from where we had installed both printers on seperate pc’s.they print only max font size 24 &max10 to 12 lines of document of font size 12,i tried to instal epson 2550 driver for both printers now they print full page document Please let me know why is it so.