Sandisk Extreme 240 SSD in MacBook late 2008


I wanted to update my MacBook with a SSD and bought the SD 240 Gb 6Gb/s Extreme. 

But when i put it in and wanted to install Mac Os X, the ssd can’t be found and a blinking folder Logo with a questionmark appears , my question, if i bought the wrong ssd or is there some other way to fix this.

Thank you

once you install the ssd you need to boot from the installation disk. what happens when you have the installation cd in the cdrom and boot while holding the “c” key?