Codesign failed on xamarin test recorder iOS (physical device)

I would like to record a test from a iOS device using the xamarin test recorder on a mac(el capitan OSX). I select the device and the .ipa (already signed by developers with an enterprise cert.) but i receive the following error: Codesigning failed. No codesigning identity capable of signing the application found. I have on the machine a free apple developer account and i am able to deploy a blank project from xcode without any issue. Do i need a different account in order to re-sign the .ipa with test recorder or it should be also possible with the free account? Thanks in advance.