OK, will do. Thanks again!

Yes.  Put this on your client as well.

Should I update this DLL on my client too?

That did the trick! Thanks Ben!

OK, try this one on the server.

Then it looks like we posted the wrong DLL.  Let me get the latest one for you.

I just updated my client, putting new enterprise dll in the SF folder in Common Files and in the GAC. I double checked that the server was updated. I restarted IIS, just to be sure. I'm still getting same error.

Well, the problem was that the value was being serialized, but after being deserialized, it wasn't being set on the parameter, so updating it on the client really shouldn't matter.  But, let me know one way or the other.

I only updated the server, but after reading this post http://forum.strataframe.net/FindPost12475.aspx, I realized that I need to update my client as well. I'm going to give that a try.

Did you replace the assembly within the \bin folder and recycle the application pool through IIS?  Either we gave you the wrong DLL, or the server is still looking at the old one.

Also, do you have the assembly in the GAC on the server?