Blank screen and lost admin access after mambo mirror users.

Mambo 4.5.1a Stable

Downloaded the G2 mambo integration from some post on this forum that I cant find again

The Gallery installation was working just fine and I could login as admin and see the admin stuff.

Then I installed the com_gallery2
Made sure all settings was ok
Turned on Mirroring users.

I created a menu item pointing the the component gallery2

Here starts my problems..

The menu item pointing to the gallery component2 is just showing a blnk page.
Soo I browsed to the installed location using Iexplorer and logged in as admin

After this I cant login as admin anymore and get the admin rights for the gallery cos it been mirrors with the user admin from mambo and i guess it have overwrote the admin in gallery2

soo.. questins..

1. where is the best place to find a new version of com_gallery2 ?

2. what is the moste common errors when the component just show a blank page?

3. what can I do about my admin users in ghallery then been mirrors with mambos admin user soo I dont have any access as asmin in gallery.