Error when import data from MS excel

Question

I have developed web project where in i can import data from excel to gridview and then upload in sql database. My code works fine when i ' using in my PC. After i publish/upload files in IIS server, and try to do the same from my PC, error occured. Error is
The Microsoft Jet database engine cannot open the file ''.  It is already opened exclusively by another user, or you need permission to view its data.
Can anyone help me why such error occured. I have set full permission in the excel file too.
Its urgent plz .........