TIMESINCE shortcode not passing text_before and text_after

I am working in the Directory theme, and I am trying to tweak the shortcode TIMESINCE…
I set up a test page and dropped the following in:
SHORTCODE: TIMESINCE
[TIMESINCE text_after =’text~after’, text_before =’text~before’]
SHORTCODE: TIMESINCE 2
[TIMESINCE text_before=”This listing was posted”, text_after =”ago”]
SHORTCODE: TIMESINCE 3
[TIMESINCE text_before=”this is the text” text_after=”and this is the other”]

Neither of these work. The output looks as follows:

SHORTCODE: TIMESINCE
text~before 08 hours 15 minutes ago.
SHORTCODE: TIMESINCE 2
08 hours 15 minutes ago
SHORTCODE: TIMESINCE 3
”this 08 hours 15 minutes ”and

so I went into the file class_shortcodes and added a printout of the $atts values as follows:

function wlt_shortcode_timesince( $atts, $content = null ) {
print_r($atts);

and here are the $atts being passed in…

Array ( [0] => text_after [1] => =’text~after’, [text_before] => text~before )

Array ( [0] => text_before=”This [1] => listing [2] => was [3] => posted”, [text_after] => ago )

Array ( [text_before] => ”this [0] => is [1] => the [2] => text” [text_after] => ”and [3] => this [4] => is [5] => the [6] => other” )

Can anybody tell me what I am missing? Thanks in advance.