how to open a password protected 7z file???

OK it's not as simple as it sounds .

I have a file which is a 7z SFX file with a .exe extention which means that it is an executable file which will extract it's contents when you open it. But i made it password protected

I might have mistyped the password when i was creating it coz i'm not able to open it now

Now, i've tried various RAR password crackers to open it but they don't even recognize the file coz it's a different format . And i havn't found any help whatsoever regarding this matter.

So, can anyone here help with me with this???