Map Properties Error

[Destroyer25]

Alright, so I went into Map Properties to change the name, description, etc. And when I tried to save it, I got this message, anyone know why, and how I can fix it?

http://imageshack.us/photo/my-images/4/wciiierror.jpg/

 

[Ultimatony]

Your map MUST be a multiple of 32, so 32x32, 32x64...

 

[Garfield1337]

Alright, so I went into Map Properties to change the name, description, etc. And when I tried to save it, I got this message, anyone know why, and how I can fix it?

http://imageshack.us/photo/my-images/4/wciiierror.jpg/

Your map has exceeded the largest size a map can have. This limit can be increased by using JNGP

 

[Destroyer25]

Your map MUST be a multiple of 32, so 32x32, 32x64...

Under map size it says - Playable: 404x340 Full: 416x352.

So how do I change it to something that works?

 

[Maker]

416x352 is valid in the sense that the dimensions are multiples of 32.

Use JNGP editor, look at Garfield1337's post.