Win 64 is not supported

Hi experts,
I set 3.0 up and then I attempted to uninstall but got an error message saying Win64 not supported. Hence I had installed 3.01 but didn’t face any problem. I attempted uninstalling to observe if I found an error message and I got. However I didn’t face any troubles removing 2.0 versions. I got the following error message:

Alert
Win64 not supported
The author of the package you are installing did not include support for this platform.
Need your help.
Thanks.
