Mmmm I think I solve it... I was wondering how does the PIC figures how many bytes I wanted to Txmit... I needed to set the lower nibble of TXB0DLC to 0~8 accordingly... Mauricio Jancic Janso Desarrollos - Microchip Consultants Program Member info@janso.com.ar www.janso.com.ar (54) 11 - 4542 - 3519 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist