Hmm, I'm not familiar with windows server 2011... I know of 2003, 2008, and 2012 though.
You could try re-registering the .ocx files:
"Component 'mscomctl.ocx' or one of its dependencies not correctly registered: a file is missing or invalid."
To fix this you need to open up an administrator command prompt. Right click on
start menu->all programs->accessories->command prompt
and then choose "run as administrator" and click yes if it prompts you.
Then perform the following commands:
cd \ioFTPD\ioGUI (or wherever you installed it)
regsvr32 MSWINSCK.OCX
regsvr32 MSCOMCTL.OCX
You should get a popup window indicating success after each regsvr32 cmd.
See if that does anything. Also, since the problem may have to do with the installer try rebooting