It could just be that you do not have bending selected for a body part. Select the body part and go to ObjectProperties to turn bending back on. If its the mesh itself then a quick run through UVMapper will cure it. Look for EditToolsWeld Vertices. (UvMapper Pro is similar but menus are rearranged). Lastly but less likely is that the weld lines are missing from the CR2 file. Open in a text editor and search for "weld". If they are not there then holler and we'll take it from there.

Hope this helps.