I had the following error with my dotnetship provider and Catalook store:

A critical error has occurred.
Could not load file or assembly 'dotnetSHIP, Version=3.2.2859.18893, Culture=neutral, PublicKeyToken=91885c727fb89dee' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

This post is a SOLUTION to that error.  I thought it might be of good use to some one with the same error, It took me a bit of time to get it figured out and I had someone else with the same problem contact me on the catalook forum.  I have figured out the error ( I did not get a solution from Catalook store and have send this one to them).  This is the normal procedure to set up the dotnetship provider on Catalook,

Below are my changes to the Catalook instructions for setting up dotnetship on Catalook, changes  are in Capitals: it turns out their instructions had errors

James

www.alavri.com

___________________________________________________
Hello

I have figured this out on my own.  It turns out there were some errors in your instructions, especially the name of the file project to compile.  Here are my corrections below.

Step 1:
Copy the dotnetship.dll into the DNN bin\ folder.

  THE BIN FOLDER HERE:
C: \CATALooKStore48\CATSTORE556_DNN48X_PA\Source\Providers\ShippingProviders\DotNetShipProvider\bin

Step 2:
To prevent assembly version conflicts perform the following steps:
1. Download Micrsoft Visual Basic 2005 Express Edition from the Microsoft site.
2. Copy the dotnetship.dll file into the \bin folder.
3. Open the project solutionfile:

CATALooKStore.DotNetShipProvider.vbproj   (<-- use this) THE ONE THEY GAVE IS THE WRONG FILE

CATALooKStore.DotNetShipProvider.sln (<-- this is wrong)  in VS2005 and check all references: Expand the node: 'References' or right click on 'CATALooKStore.DotNetShipProvider' -|> Select 'Properties' -|> References -|> Delete all references (dotnetship.dll) that are not available and add them again or add a reference path 

CLICK ADD, THEN BROWSE, THEN FIND FILE ABOVE

 to the \bin folder of the CATALooKStore.DotNetShipProvider project (click on the [Reference Paths] button on the top right portion of the 'References' page).
4. Rebuild the project. TOP MENU BUILD>REBUILD

5. Copy the CATALooKStore.DotNetShipProvider.dll into the DNN \bin folder.

FOUND IN THIS FOLDER :C:\CATALooKStore48\CATSTORE556_DNN48X_PA\Source\Providers\ShippingProviders\DotNetShipProvider\obj\Debug