Links to Twitter not working

I have a plugin for Twitter running and the general information is coming up fine. However, I’m having trouble with the retweet, favorite, and reply buttons.

Initially, they showed up, but if I clicked received an error message:

• https://twitter.com/intent/favorite?tweet_id=3.93160313627E+17&original_referer=http://sublimecode.com.br/sublime-tweets/demo/user-timeline/

When I found how to get rid of the error, the icons did nothing. Trying to fix this, the icons are now not appearing at all – even though they’re still in the code. So I’m a little frustrated.

Here’s the piece of code I’m looking at:

<div class=”sbttr-user-timeline-item-desc”>
<?php echo $twitter->linkable( $tweet ) ?>
</div>

<div class=”sbttr-user-timeline-item-actions”>
“<href=”https://twitter.com/intent/tweet?in_reply_to=&lt;?php echo $tweet->id ?>”<i class=”icon-reply”></i>
“<href=”https://twitter.com/intent/retweet?tweet_id=&lt;?php echo $tweet->id ?>”<i class=”icon-retweet-3”></i>
“<href=”https://twitter.com/intent/favorite?tweet_id=&lt;?php echo $tweet->id ?>”<i class=”icon-star-empty-1”></i>

user->screen_name ?>/status/<?php echo $tweet->id ?>” rel=”nofollow” target=”_blank” title=”<?php echo $tweet->user->name ?>” class=”sbttr-user-timeline-item-timestamp”>
<?php echo $twitter->time_ago( strtotime( $tweet->created_at ) ) ?>

</div>
</div>

I know the error is within the links to Twitter, but I haven’t been able to find the “exact” problem. The fix is probably easy – If someone could shed some light I’d appreciate the help of fresh eyes.