Unable to login – Blank login page!

Prob outlined in ..
https://www.ads-software.com/support/topic/93196?replies=5

Discovered that the problem will reappear if I muck round with kubrickfsb.
Solution: changed to std kubrick and all’s well -but not widget enabled.
Has anyone checked compatibility between 2.0 and kubrickfsb?
By the way..How do u check for version of your wp blog?
I may be on 2.0.