I have my datasets inside a folder in my SSRS web portal. This datasets are asociated with a stored procedure in SQL Server.
I create datasets, I run them to see the result and then I use them in my mobile reports.
Everything is ok.
The problem comes out when I update the stored procedure in SSMS and add new columns in the result. When I open the mobile report from Mobile publisher and I click "update data", nothing happen. This is because I must first run the dataset from report builder to regenerate the new columns. But when I click in de dataset "edit in report builder"
This happen:

It remain loading some time and then it close and do not open the dataset (it has no relation if I use windows credential or an sql user). This don't happen if I open a dataset wich stored procedure has not been updated (updated with new columns). Now, what I have to do is create a new Dataset with the update procedure and recreate the mobile report...
What is happening? Why I can't open datasets with Report Builder when I update the stored procedure?
Thank you.