Warning: fopen(switch.on): failed to open stream: Permission denied in shared/global.php on line 1600

Sent by Dominique

Hi. i get this error when i try to get on my controlpanel:

Warning: fopen(switch.on): failed to open stream: Permission denied in /mnt/****/yacs/shared/global.php on line 1600

how do i get rid of that? i cant get to the control panel it redirects me to the setup page

i hope you can help me THNX. poor english because i'm dutch.