text won't appear above shortcode

hi, have a nagging issue that i can’t solve. looked everywhere in the forum…i’ve seen this question asked, but no answer yet.

i’m using a plugin called “WPECARDS” that uses a shortcode. everything’s fine, EXCEPT i cannot get text i write in the post to appear ABOVE the shortcode. no matter what i do, the text always appears BELOW the shortcode generated content.

for example, if i write this in a post:
intro copy, intro copy, intro copy
[wpecards]

it always appears like this:
[wpecards]
intro copy, intro copy, intro copy

i read something about having to use “return” instead of “echo” in the plugin, but i didn’t write the plugin, nor am i a programmer.

i did find this code which is supposed to place the text above the shortcode, but i don’t know where it goes:

ob_start();

[PHP script or function call]

$result = ob_get_contents();
ob_end_clean();
return $result;

can anybody help me?