How to be seen on someone's twitter page?

[!)ilara]

I just signed into Twitter and cannot figure out something. I am twitting to someone putting @name, for example, but I cannot see my message on that person's page. Some other people's massages are seen on the page but mine are not.

[Sara]

I'm not entirely sure why that has happened but if you go onto the persons page and click reply and type your message and send it, it may work. The spelling of the username may have been wrong or there was a glitch with it.
Hope this helped