Problem with file extensions

Hello, I am trying to get a lightbox plugin to work, and all which I have tried, including this one, do not work with the native image codes that wordpress creates

<a>http://businessbank.imb.br/wp_bb/wp-content/uploads/2015/07/14><img class="alignnone size-thumbnail wp-image-62" src="http://businessbank.imb.br/wp_bb/wp-content/uploads/2015/07/14-150x150." alt="maresias-perspctiva-fl1" width="150" height="150" /></a>

but does if i change change the link to include .jpg, but this means having to upload and link sepereately..

<a>http://businessbank.imb.br/wp_bb/wp-content/uploads/2015/07/14.jpg><img class="alignnone size-thumbnail wp-image-62" src="http://businessbank.imb.br/wp_bb/wp-content/uploads/2015/07/14-150x150." alt="maresias-perspctiva-fl1" width="150" height="150" /></a>

http://businessbank.imb.br/wp_bb/ link to site

thanks for any potential help..been banging my head against the wall on this one.

https://ww.wp.xz.cn/plugins/lightbox-plus/