If you find that the info pen conflict with plus,you should check the three things:
1.make sure that your plus is a 3.0 or later version.
2.make sure that your info pen is the latest version,that is info pen pro.
3.if you are a win98 user, update you older infopen.
BTW,I find that the info pen pro can work well with plus 3.0 or later version.