Internal Server Error Problem!

[ZedPain]

I get the internal server error because i moved host.
i checked the error log and i show
error:
[Thu May 13 09:22:34 2010] [error] [client 79.164.12.177] SoftException in Application.cpp:256: File "/home/mac/public_html/forum/index.php" is writeable by group

[Kill Em All]

Try to CHMOD your index.php to 644.

Also look here:
http://www.simplemachines.org/community/index.php?topic=340411.msg2293433#msg2293433