Jess on "Plugin installed, admin dashboard won't work"

If you can't get into your admin dashboard, try resetting the plugins folder by FTP or PhpMyAdmin (read http://bit.ly/UhpkLl if you need help.

Then check the memory limit for your site. There are a number of ways to increase it, depending on your host and server settings. Do a search on these forums for "increase memory limit" and you should find everything you need.