If the Kasamba icon in your system tray appears in grey, it means that you are "Not Available" for Live Chat. To change your availability, click the Kasamba icon in your system tray, and select "Status" from the menu. You can choose from "Available to Chat" after which the Kasamba icon will change from grey to green.
Your phone availability is set by logging into your Kasamba account and managing your availability by clicking the arrow on the bar located on the bottom right in the website. If you do not see the bar, you are either not logged in, or haven't verified any phone number yet. When setting your availability you'll need to choose which number you're available on, if you have multiple numbers on your account. If you're not available you'll need to change your availability to "Not Available".
Please note that chat and phone availability is not co-dependent. You can be available on both, or neither or only one of the two. Setting yourself as "Not Available" in chat, for example, will not alter your phone availability.
Once you are available, a "Let's Chat" button will appear next to your Advisor profile on Kasamba. If you are available for Phone, a "Call Now" button will also appear. You can also set your Advisor Messenger to automatically change your status from "Available" to "Not Available" if you are away from your computer for a certain length of time. This option is in the messenger "Settings" window under the "General" tab. That feature only affects your chat availability.