My K8200 printer communicate with Repetier 1,03 via PC (WIN Vista). I can set the XYZ to zero with out a problem. I can open heaters for table and extruder and fan. But when I try to print something it heats up the bed and extruder and lost the communication with printer. I have tried Repetier 0.84 (didn't even open with Vista), work with 0.90 same, 0.95 same, 1.03 same. I don't know what to do.<br style="margin: 0px; padding: 0px; color: rgb(50, 61, 79); font-family: 'Lucida Grande', 'Trebuchet MS', Helvetica, Arial, sans-serif; line-height: 18.200000762939453px; background-color: rgb(236, 236, 236);">Please help.