Beta 2 and Beta 3 after upgrading suddenly does not resize screen resolution

After upgrading from official stable release to beta 2 and beta 3:
1) my screen resolution does not change if i modify the screen windows size (remains a black windows all around the original windows screen size if i make resolution larger and window screen is not reduced if i reduce it).
2) coherence is disabled and there's no way in parallels tools to enabled
3) cntr alt does not work
I'm having all these problems on a imac 24 and imac 20
How to solve that ?
I've obviously install last Parallels tools center ...
thanks