HIRAGANA don't work! Please help!

Q.
What in the world is wrong with my computer(Microsoft XP)?
My friend taught me about your website, and thanks to your intstructions, I got to type in Japanese - HIRAGANA and everything, just fine!!
But one day, I don't know what key I have touched, but while every other things are right there - the Language bar - Input Style/AInput Mode/Conversation Mode/IME Pad/Tools... just like the way it was! And I clicked HIRAGANA to type in Japanese, the all over sudden it only comes out in alphabets!!
I had no clue why it is happening, so I followed the instructions again(the only this time I did not insert the tried again today, did exactly the way the instructions says(the only difference this time was that I did not have to download the Microsoft XP CD because it was not asked to).
But no matter what I do or how many times I try, it never changes. I can only type in alphabets. So what's the sense of having all this language bar? I just cannot figure it out, what am I doing wrong?
Please help me!!!!!!!

A.
Hi Tomoko-san,

Your trouble sounds very strange.... Well,let me doublecheck on your PC settings.

1. You've already installed Japanese input services like below;
http://nihongopc.us/ossettings/xp31.html
and you can see "Japanese" in the installed services.

If so, let's check out this settings.
http://nihongopc.us/ossettings/xp39.html#6

2. Have you ever tried to start your PC in "Safe mode"?
If not, try it a couple of times. Sometimes it helps to recover your basic settings.

3.Can you restore your system to an earlier date when you typed in Japanese correctly?
http://nihongopc.us/faq/2005/05/system_restore.html