WP-grins causes comments to freeze

I’m using WP 2.1 and installed the WP-grins plugin. My problem is – while posting a comment, if I click on a emoticon and then hit the submit button, the comment shows up, but my original comment text stays in the comment box, and the submit button is greyed out while the small circle to the left of the submit button spins and spins forever, like the page is frozen up. You can see a pic of what it looks like here: https://www.lostnomad.org/wp-content/uploads/2007/01/wp-grin.jpg
In order for me to be able to post another comment, I have to hit the stop button on the browser and reload the page. Any ideas?