danarashad 17 Light Poster

One of my app's is timing users out around 20 minutes. I have a sessiontimeout set at 90 minutes.
Please help.
Here's the actual code.

<CFAPPLICATION NAME="Store" SESSIONMANAGEMENT="Yes" SETCLIENTCOOKIES="YES" clientmanagement="yes" 
sessionTimeout = #CreateTimeSpan(0, 0, 90, 0)#>

I am using CF 5.
I did notice in CF admin I have the maximum session timeout set at 20 minutes. And the default timeout for session Variables is set at 20 minutes.
Now I have it like that on other servers; and they work. But I do have a count down timer set in a CSM.
Thanks for any help