Wacom Bamboo Pen and Touch tablet problems?

Ok, so I just got a Wacom Bamboo Pen and Touch tablet.

Like my old Wacom Intous 4 tablet, it won't go the full length of the screen and draws inaccurately.

My bamboo pen and touch tablet is new, and hasn't worked correctly AT ALL since I've gotten it.

I mean, it works as in it's connected to the computer, but the pen cursor is slow. When I draw, the drawings show up shaky, but im not shaking my hand. My wacom 4 tablet, does the same, but sometimes (rarely, tho, nowadays) works properly when I unplug it and replug again and straighten the wires. I've tried straightening the wires and replugging multiple times with both of my tablets now, and both are not functioning correctly like a good tablet would. Basically, my tablet is being GAY. (im sorry, im just really frustrated since tablets are expensive ;_; very sollly xD)

Other info:

-I've installed the driver software.

-The model number is CTH-661

-When my tablet pen makes contact with the tablet, the light turns red when it is usually white.

-It draws slow. When my wacom intous 4 worked properly, it drew in sync with my hand and pen. Now, both tablets are slow and don't draw the proper shape(or wutever) i draw.

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Does anybody else have the same problem? If so, plz give me some tips on how to fix this problem.

Thank you for reading ;_;

I really appreciate it ;_;