By default, Web chat displays only contact who are online. To see all contacts (including those users who are offline), follow these instructions:

1. Login to Text IM. That will bring up the following

2. Click on More stuff icon (indicated by Red Oval in above image). That will bring up the following screen

3. Click on Show all friends icon (indicated by Red Oval above).
4. This will make Web chat display all contacts, including those users who are offline.