Publishing tfs work item entry application

[Paulzc421]

I developed a small program that contains a web form. in this form user fills fields of a Team Foundation Server work item and I add it to TFS work item tracker as a bug. It's all nice and well up to this point. but when I published this web application and hosted on IIS 7 I came across the following exception:\[code\]Could not load file or assembly 'Microsoft.TeamFoundation.WorkItemTracking.Client.Cache' or one of its dependencies. An attempt was made to load a program with an incorrect format.\[/code\]noting that I use .net 4 and my team foundation assemblies' version is 10. besides I have IIS 7 on my server.please give me a hand to fix this issue.