Conditional Report Parameters

I have a report with required parameters of company and project. I then have 3 parameters that I want to be conditional - start date, end date and cycle.

By conditional I mean if cycle is chosen then start & end date are not required. If start and end date are chosen then cycle is not required.

I have made all 3 parameters 'Allow Null Values" however cycle's available values are set from a query once a project is chosen. When the field refreshes I lose my null checkbox for cycle, so it ends up always being required.

Am I going about this the wrong way? I'm using 2005.

I'm not sure that conditional report parameters exist, but could you accomplish this using optional parameters?

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=621340&SiteID=1

|||

Hmm, not really. I don't want all 3 to be optional, either cycle or start/end date need to be required.

I'll keep banging my head against the wall... Thanks though.