WebI XI 3.1 product 12.1.0

Hello

I use WebI XI 3.1 product 12.1.0.

I export an WebI report into Excel report .xls.

In Excel application, I have a problem.

The WebI formatting is not preserved in Excel.

In Excel, all cell are tight.

And the same report exported from DeskI to Excel have any problem.

So, where is the problem ?

Thanks advance for your help !