Problem How I can turn off the Grid on my World ?

[Sh3it4n]

Heya,

before few Minutes I Updated my Mindcrack Server and everything works fine...but after I logged into the Game I saw an Grid of Red Stripes all over the World

What can I do to turn this off ?
Because it is really annoying to me.

Hope anybody know something about my Problem and even can help me out of that.^^

 

[Devul]

Press F7, mate.

 

[Sh3it4n]

Ahh cool thank's a' lot Mate =)