Blank page for new entry or editing posts

We have our site up-to-date joomla 2.5.17 and have purchased/upgraded to the newest easyblog. But when I go to edit an entry or try to add a new entry - all I get is a blank page.

Have tried this both on a macintosh and a pc...so it's not an operating system error. I even reinstalled joomla JIC. Not a joomla issue. It was working 4 weeks ago - the last time we did a newsletter. Today when I tried, it gave me the blank page, so we purchased the newest version of easyblog and I uninstalled and installed the newest version. Still having the blank screen.

Anyone have any ideas? I put in a support ticket - but looks like they don't work weekends.

Thanks