How do i change my phones voice mail message on my blackberry curve cell phone.?

Please Help I really need someone to tell me how to change my voice mail message. This is what is says:

You Have Reached (my name) is not available At the tone please record your message



---- I WANNA CHANGE IT!!-----How do i change my phones voice mail message on my blackberry curve cell phone.?
You need to call your voicemail number, whatever that may be. It will give you options such as checking your voicemail, changing your options %26amp; greetings, etc.