Error only on automatic start

My workflow is set to automatically start when an item is created or changed, however, I automatically get "Error Occurred." If I manually start it, it works just fine. My workflow history seems to be ok.  There are 3199 items with a limit of 20000. Here is the error that I get: 

Microsoft.SharePoint.SPException ---> System.Runtime.InteropServices.COMException (0x8102009B): <nativehr>0x8102009b</nativehr><nativestack></nativestack>

   at Microsoft.SharePoint.Library.SPRequestInternalClass.AddWorkflowToListItem(String bstrUrl, Str

I can't figure out what is wrong. Thanks.