The application “EPSON Scan” could not be launched

I install EPSON Scan driver in my system now I want to scan my documents but when I try to scan any thing by this scanner then I receive this error. Error describe about share library. Please tell me what is this and how can I resolve it so that I can scan my documents.

Application Launch Failure
The application “EPSON Scan” could not be launched because of a share library error: “<EPSON Scan><EPSON Scan><TWAIN Source Manager.Shlb><>”
