iPod Touch NOT recognized in iTunes : HELP NEEDED

My Ipod Touch is NOT being recognized by itunes.

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-Ipod Touch 3g with 4.3 software
-iTunes 10.2
-PC: HP Pavilion Dv6.
-OS: Windows 7 64-bit [Eng]
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Ok so... I previously kept my ipod touch version as 3.1.3, and only used itunes 9.2 because I tried using itunes 10.1 and my ipod wouldn't work with it, so I downgraded back to itunes 9.2.
With this, everything was working perfectly fine.

I recently bought an app from the app store (Infinity Blade) and tried to sync and install it onto my ipod touch 3g.

itunes had a popup reading that it couldn't be installed as my software had to be 4.1 or higher.

So, I decided to update my ipod.
Like I said above, I tried using itunes 10.1 with my ipod but it wouldn't recognize it then either, so I went back to using itunes 9.2.
Because of this, I had to manually install the 4.3 software onto my ipod.

Tried using my newly updated ipod (4.3) on my itunes 9.2, and it said it didn't work, that I needed the new itunes.

So, I installed iTunes 10.2, plugged in my ipod touch 3g with 4.3 software,
my computer said it downloaded the Apple Device drivers successfully. My ipod shows that it is being charged, but it is still not being recognized in itunes.