Multi Valued Report Parameters

Hi

I am new to SSRS and this Qs is basic reporting problem. I have a multi valued param called cycle in my report.
The user can select all ,one or two. But I also want to implement this way.
When the user doesnt select anything all the data should be displayed.
Here is the problem
param : Cycle ID Select ALL
One(1)
Two(2)
In the preview report as soon as i clcik viewreport it asks me to select a cycle id. is there a workaround for this.Please let me know.

Thanks
SQL NEW

[533 byte] By [SQLNew] at [2007-12-21]