Cannot access ACP

[mp3president]

Hello,

My forum (v 3.8.6p1) has moved from a shared host to a VPS.
When this was done, i could still access my ACP, but there were some errors on the site itself.
The shout and Cyb - Advanced Forum Statistics 6.6.2 showed some mistakes.
I turned them both off in the ACP and first re-installed Cyb - Advanced Forum Statistics 6.6.2 with overwriting.
Then the page should go automaticly to the plugin- or homepage of ACP.

But no, all i did see was a blank screen with in the left top corner the following "code"



Now i can't access my ACP anymore and i guess it has something to do with re-installing Cyb's AFS.
But maybe i'm wrong about this.

Is there somehow a way to access my control panel anyway?
Or is there a possibility to reset it?
Somewere i noticed the following message:

Upload tools.php from the /do_not_upload directory

But i'm not sure it will help me with this problem, so first i'll ask some help my self.

Can someone help me with this problem?

Grtz Ron

PS: Sorry, if my English writing is a bit wrong maybee, but it's not my normal language.