Excel on BB Tour...How to dial number right from a cell AFTER ss is downloaded?

Bought my Tour yesterday.

Having issue with excel to go application. How do I click on a cell with phone numer in it, and then dial that number?

When I open an email, with excel ss attachment (and just click "view"), I get an enlarged view of ss. When I click on a cell (phone # column), it moves to another screen with #'s from that cell. Then when I hit "dial button", it calls that number.....that's what I want to do...

problem when I download that ss to excel to go, and hit space bar on a cell, it show's #'s for cell, but won;t let me dial that number. When I hit"dial button" it moves me back to recent call log screen?

Thanks for help