Some troubleshooting idead:
- try removing the clip end of the pen, and turning the transmission to extend the point. If rotating a 'naked' transmission extends the point, then the problem is probably the way the transmission is placed in the tube.
- does the clip end of the pen fit snugly onto the point end? If it's loose, it could be that the small '****' on the side of the transmission aren't engaging with the upper tube. In this case, the upper portion of the pen can rotate, but the transmission won't extend the point.
- remove the clip end, and check the position of the transmission. It should be pushed into the point end all the way to the embossed line. If the transmission isn't pushed far enough into the lower tube, it will slip inside the upper tube when the clip section is attached, and then the clip section won't be able to rotate.
- if these ideas don't get to the problem, then it's likely not the placement of the transmission in the tubes, but rather the transmission itself. Try removing the transmission (easier said than done), and try a transmission from another kit.