In order to help you best please elaborate a bit more: What sort of "version compatibility issue" are you experiencing? What are the symtpoms? What are the error messages? When/where do you get these error messages?
1. What kind of application are you testing (HTML, Silverlight or WPF)?
2. Send us the execution log.
3. Please record a Jing
video demonstrating the entire process, so we can better understand what is happening.
4. Provide us with a copy of your test and grant us access to your application so we can reproduce the issue on our end and give you a solution.
5. If it is not possible to grant us access to your application and it is not WPF application, please take a Fiddler trace and attach it to a support ticket in a zip file. You can capture a Fiddler trace using FiddlerCap
Looking forward to hearing from you.Regards,