I can`t open jar files though my java version is updated

Hello everybody, I`m using Macbook Pro 13` with Lion on it.
As it says in the title, I can`t open jar files though, my java version is updated.
It says, I shuld check the console.
Right now, my java version is, "1.7.0_15", and i`m trying to open a jar file created 3 days ago, by some developer.
Although, if im trying to open jar file created 1 year ago, it doe`s open.
Why is that? and, How can i fix it?
Thanks.

Franeo wrote:
Hello everybody, I`m using Macbook Pro 13` with Lion on it.
As it says in the title, I can`t open jar files though, my java version is updated.
It says, I shuld check the console.
With Java 6 and prior, you had to enable logging first before you could view error messages in Console.  I am guessing that you need to check the Java Control Panel to see if logging is turned on.

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