Error in Debug Mode in SSIS Designer

Jun 26, 2014 at 4:09 PM
I am working in BIDS (SSIS Designer) 2008 and created a C# script task then added EPPLus.dll as a reference and get the following error:

Error: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.FileNotFoundException: Could not load file or assembly 'EPPlus, Version=4.0.0.1, Culture=neutral, PublicKeyToken=ea159fdaa78159a1' or one of its dependencies. The system cannot find the file specified.
File name: 'EPPlus, Version=4.0.0.1, Culture=neutral, PublicKeyToken=ea159fdaa78159a1'
at ST_8c2e71bfe43f48e2bad80e1d40d31c52.csproj.ScriptMain.Main()

Any help with this error would be appreciated.