Can't change Wordpress theme title tag

I usually customize by title tag in the header.php file for any theme.
But this particular theme i am using simply will not change the title tag regardless of what i insert in the header.php file. I even just inserted some random text to see the effect but nothing changes. i cant change it from:

post title | blog name

I want to get rid of the blog name so i can just have the post title. I can do this no problem on any other theme except this one! Is there somewhere else that it would be reading the title tag from?

Ive also tried the All in One SEO plugin to change the title but that does nothing either.

The theme is the Espire WP Theme

 

Share ur website link i m using all in one seo plugin n i can change title tag without any problem, ensure u have upgraded ur seo plugin into new version.

 

URL please, and check your File Permissions.

 

Go to Presentation > Theme Editor > Header.php and look for the code between <title> and </title> tag. Replace it with

It is a simple title optimization that only shows up title pages and blog post name.

 

I know the code to use, Im saying that the theme does not change the title tag regardless of what code i enter there. And Im doing it via FTP so there are no permission problems.

 

Have you checked the PHP code? May be you missed something there.
Post the code here.