[Plugin: NextGEN Gallery] Left/Right Arrows Missing

Hi, I have just installed 3.1.3 and also NextGEN Gallery 1.7.4 today and have it all styled perfectly, except the left and right arrows are missing. I had used this same style on a previous install and the arrows were automatic if I recall. I can’t find any differences in the CSS, plugin options, etc and am pulling my hair out over a couple of silly arrows. Is anyone more familiar with this issue? I searched and found people switched effects in the plugin options. I’ve tried them all with no visible arrows.

Site can be seen here. Thanks for any help!