These are lates drivers for Wacom Bamboo Pen Tablet(Windows 7):
*cdn.wacom.com/U/bamboo_setup_web0407final.exe
Install these first.
Are you talkin about pressure and sensitivity tablet prob in adobe creative suite or any other design suite like autodesk maya etc for that matter then
Do this:
1.Click the Windows button, and in the search box type “Change tablet pen settings". Open the item that appears.
2.In that dialog, in the Pen Options tab (the default), in the Pen actions group, select the Press and hold pen action and then click the Settings… button.
*lh6.ggpht.com/_qvLGUOISC18/SuzN1Brly6I/AAAAAAAAASU/x0holHtWZb0/s1600-h/image%5B15%5D.png
3.Then, in the dialog that appears, uncheck Enable press and hold for right-clicking and click OK.
*lh6.ggpht.com/_qvLGUOISC18/SuzN1t0z43I/AAAAAAAAASc/kCOhIrd7_Qg/s1600-h/image%5B19%5D.png