Photoshop CS4 brush tool stops painting

Ok so heres my problem. When I use the brush tool and start painting it works just like normal, till I lift my pen off the surface of my tablet. When I touch the pen back to my tablet to start drawing again nothing happens. photoshop wont draw anything or let me do anything.

I can move the mouse around but its stuck in brush form so it looks like that little circle. I cant change tools but when I mouse over them they change color still so it doesnt seem frozen. If I click out of the program to Finder or the desktop and then click back to photoshop it works again but only for one stroke of the brush tool and I have to repeat the whole prosses of clicking finder and back again for it to work. it seems to happen with some of the other tools too. I havent tried all of them. its very fustraiting. It seems that when I use the zoom tool its fine though.

This problem started a little more than 10 days after I installed photoshop. everything worked fine then. I also have not downloaded any new programs since installing photoshop. Im pretty sure its not the tablet since I have tried using 2 different ones and it still happens with both, even when I use a mouse.

I have not tried to reinstall photoshop yet but im wonering if that might help. if i do need to reinstall photoshop how should I go about doing that? Im worried that if I do something will happen and maybe it wont accept my serial number again. can that happen? Please any help you can offer is much apreciated. I hope I explained everything clearly as posible.

Adobe Photoshop CS4 ver 11.0.1

Mac OS X ver. 10.5.8

Amount of free disk space. 429.1

GBNVIDIA GeForce 9400M

Wacom Intuos4 medium

Photoshop CS4 brush tool stops painting

Have you installed the correct Driver? http://www.wacom.com/downloads/drivers.php

Photoshop CS4 brush tool stops painting

I installd the latest driver like you said but it seems to still be having trouble.

Is it JUST a Photoshop problem, or is the tablet misbehaving in any other apps? The symptoms you described are SO like what I have seen when people don't even install a driver. Is the tablet USB plugged diectly into the mac?

I have not tried to reinstall photoshop yet but im wonering if that might help

Ive only been having the problem in Photoshop and it only started about 10 days after I installed it. before that is was completely fine. I installed the latest driver from wacom. The USB is pluged directly into my computer. the mouse for the tablet is sitting about 3 feet away since I dont use it really. I called adobe and they told me to re-install photoshop, which I did. but the problem still persists. Im thinking I might call again. any ideas whats going wrong?

To be honest this is a difficult one. I suppose it may be a problem with the new Inuos4, but its not a common problem - because I've not seen it reported elsewhere. Do you have any special drivers installed? Mouse drivers for example - that may be interferring in some way? Is there anything installed on your machine that may be causing some conflict?

sure its not the tablet since I have tried using 2 different ones and it still happens with both,

I called adobe again and they walked me through reseting all the brush settings back to the original settings. I thought they had been since I reinstalled the program but aperantly not. in the brush menu I deselected all the boxes drew with that and slowly reselected the right ones. and everything seems to work now. I was so amazed that thats all it took for such a huge problem! they told me if it happens again to go into the library and go to prefrences and rename com.adobe.photoshop.plist to com.adobe.photoshop.plist1 in the get info section. I hope if any one else ever has this problem that this help them out.