Here are some questions to help isolate the problem and help repair the problem you are experiencing.
Did the installation have any errors?
When you run an Add/Update (otadd) did you receive any errors?
Were the directories and files for the device created within /var/opt/OverTime/data?
Was a devicexxx.mst (where devicexxx is the name of the device) file created in /var/opt/OverTime/cfgs?
Does devmst and devdtl exist in the cgi-bin directory of the web server and can you run them?
Do you see the device name appear in the OverTime/index.html page after its refreshed?
Is there a directory in the web server area called OverTime/devicexxx?
Are there any files in the OverTime/devicexxx directory?