we need more details.
What's the cookie name ?
Is it saplb_ ? is it changing (so the asterisk saplb_*) ?
The CSM can only learn the value of a cookie for a specific name which is static.
This is done easily.
IE:
gdufour-cat6k-2(config-module-csm)#sticky 100 cookie saplb
Once you have created your sticky group, you can assign to your vserver
gdufour-cat6k-2(config-module-csm)#vserver www
gdufour-cat6k-2(config-slb-vserver)#sticky 60 group 100
Gilles.