Web embed calendar does not show full calendar - see screen shot below.   

Does anyone know what may have gone wrong here? 

Thank you

Here is my embed code snippet: 
<iframe width="100%" height="1000" src=" https://ehr.charmtracker.com/publicCal.sas?method=getCal&digest=711b49a1f057126d8233602b965c634be22caeacfd2114b30d57a64c711601c2405c8176170639bd71dbc67b80c25f36debf17855dc5f624" style="overflow:hidden;" frameborder="0"></iframe>