Looks like the problem was with my connectionstring.  The one posted above worked on my local box, but on the server I had to switch it up by file type and add IMEX:

<add name="xls" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties='Excel 8.0;IMEX=1';" />
    <add name="xlsx" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties='Excel 12.0 Xml;IMEX=1';" />
    <add name="xlsm" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties='Excel 12.0 Macro;IMEX=1';" />

Switching to these and appending the file location worked to get the full import running.

Now on to the next problem!