WP the_content($more_link_text), strange behavior

i using wordpress 3.1.3 to develop custom theme.

it seems my theme has strange behavior.

in the post from WP admin i add <!--more--> tag to cut the content, and display read more link. and now i want to change the read more text, which the default text is Continue reading “PAGETITLE” »

i put this code in the loop of my index.php theme.

the_content('a');

this didn't change the Continue reading “PAGETITLE” », then i try this

the_content('');

it cleaned the text (which mean for me the code is work). but what im trying to achieve is change that text to READ MORE. and this not success. 开发者_如何学运维

i think this maybe because of the plugin, but i already try deactive all of the plugin, and still didn't work.

How this can be happen?

I put the code of my index.php here http://ideone.com/ya4Sr

can you please help me, maybe there is something wrong with my looping.

Thank you in advance,

GusDe

There is some plugin change my readmore text, and i thing this question not relevant anymore.