Fans don't seem to be working after installing windows7

Dear all,

Last week I did a clean install from Windows Vista Home Premium SP1 32 bit to Windows 7 Enterprise 64bit. During the process this forum helped me a lot, and most of my problems are solved now, but... Since I installed Windows 7 I noticed that my laptop (Dell Inspiron 1545, Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz, 4 Gb RAM, Intel Chipset) is getting very hot on the surface and I don't hear the fans running anymore. While using Ableton Live 8 the laptop shut of twice, I think of overheating.
I had contact with Dell Support today, who said they couldn't help me because I did my own install of Windows 7, but the tech guy told me to do a BIOS update, which I did, without any results so far. I downloaded SpeedFan which tells me my CPU temperature is at rest (only Firefox and Media Player opened) around 60 C. When I want to configure my fans through SpeedFan the program doesn't find any fans to control.
Has anyone else had this problem, and if so, how can I fix it?

All help is greatly appreciated.

First of all, thanks for your reaction. I found this app as well and tried to install it, but Windows won't let me install the driver because it is not a signed certificate. Do you know anyway how to bypass this?

Okay, I got the fancontrol program working with help of another forum about making it run on Windows 7. It shows me the temperatures and lets me select to make the fans run faster. Only that doesn't do anything, it also doesn't show numbers in the fan rpm window. It seems that my computer doesn't recognize my fans anymore.

Anyone got an idea (apart from going back to Vista, which I don't really wanna do)?

Did you disable driver enforcement to install the app? Right-click it and select run as administrator.

yeah i disabled driver enforcement and got the program working, but it doesn't connect to my fans i am afraid.

Yes that's the app. I got it working, but when I force the fans to high speed they don't turn on, neither does the program show the fans RPM.

So I guess you're right when you say there's a problem. Does anyone have an idea what the problem is?