Saving for web in PS

[Joltar]

I have tryed alot to get my design in photoshop to save for web...the save for web option is greyed out, what are the requirements to save for web, please help.
Ty in advance

[Yeldarb]

you have to slice up your image using the slice tool

[mlkedave]

no you dont, i got it working joltar, dont worry about it