External table is not in the expected format.

Great day to all,
While I am working with my worksheet at office I received an error message generated by Microsoft Excel, I pasted below the whole content of the error message for better view of my problem.
Microsoft Excel
Step “DTSStep_DTSDataDrivenQueryTask_1” Failed
Error: 2147467259
Source: Microsoft JET Database Engine
Description: External table is not in the expected format.
Step “DTSStep_DTSDynamicPropertiesTask_1” Succeeded
Ok
As I read on the error message, it gives me a lot of head ache since I am not a technical person to understand the error, I also found nothing when I search on the internet for similar error, that is why I tried to post this issue here on techyv, hoping to get some ideas on my problem.
Thanks for reading my post.
