Eclipse europa not working at first launch

I was setting up eclipse europa. It is not working and I am not familiar with this. When I run the eclipse.exe file it shows me the above error. Since I couldn't copy and paste the error, I just took a screen shot of it (you can zoom and see the error. The picture is very clear). I have other eclipse versions (hilios and indigo) and they work fine. But I couldn't use the europa version. Can you guys please help me how to solve it?

I use windows 7 64 bit. If you need any info, please let me know. Thank you.

If you are on a Windows 64bits, you need to download the 64bits version of Eclipse Europa, and make sure you have a 64-bits JDK.
Or you can try a 32-bits with a 32bits JDK.

But here, it appears you have a mismatch between your Eclipse ("-os = win32") and your JDK.