I have AutoCAD 2008 and Mechanical 2008. But I perfer using AutoCAD 2008. When I open mechanical drawing with mechanical 2008 weld, tolerance and datum symbol, the drawing was not shown properly (weld, tolerance and datum symbol just show block with name something like Acmsym BB). But other persons don't have the problem. I have installed Mechanical 2008 service pack 1 and 2. The problem was still there. Does anyone have idea what's going on? Thanks in advance.