Sidebar page and category

Hello everyone,

This is my first post.

I can’t seem to find a resolution to my problem.

In my side bar I have this code:

<?php if (in_category('pageone') || is_page('pageone')) { ?>
HTML menu
<?php } elseif (in_category('pagetwo') || is_page('pagetwo')) { ?>
HTML alternative menu
<?php } else { ?>
HTML error message
<?php } ?>

The menu appears on a post but defers to the first if statement on a page. I can’t figure out what I am doing wrong.

Can anyone help?

Thanx in advance.