I reloaded my version of Injection Magic to check your problem.  It is not my favorite program for creating Inj/Rem poses but it will do right now. 

Now, you loaded Aiko 3 into Poser and morphed her to your liking.  You generated a CR2 file by saving the morphed figure in the figure section of your library.  Since I-M was able to create an Inj pose pz2 I am assuming that Injection Magic was set up correctly.

When you go into Step 1 tab of Injection Magic, make sure that your input CR2 file is the morphed figure you created (if you see any reference to a Target CR2, that is your source file).  Under Parsing options, uncheck everything except 'Include Morphs' and 'Non-zero Morphs Only'.  Click the Parse File button on the right.  Let the program creat the CR2 Specifications.  Click Next.

Under Step 2 - Options, check everything under General Options on the right and 'Include Morphs' and 'Include Morph dial Settings' under that.  Everything else should be unchecked.  Click next.

Step 3 - Generate.  Click Generate.  If there are no errors a new window will open asking to save the Inj/Rem Pose into the Pose folder you have created for your new morphs.

If everything worked without a problem, go back into Poser, bring in an unmorphed Aiko 3 into the scene and then go to the Pose section to find your new Inj Pose Icon (button).  Make sure Aiko is selected and double click the Inj Pose button.  You should see Aiko morph with all your settings. 

It has been awhile since I played with this program, but I can tell you that it has worked for me just before writing this reply.  I can inject and remove my morphs without a problem. 

I am also including a link to a tutorial for Injection Magic.  It is a PDF so make sure you have adobe reader installed on your computer.

http://digitaldesignsunlimited.com/Market/index.php?act=viewProd&productId=110

Let me know your progress.