Crystal subreport links

[Katy44]

I have a really strange problems. I have three subreports on a main report. The main report has three parameter fields - Param1, Param2, Param3. I want to pass Param1 into subreport 1, Param2 into 2 etc.
In each subreport, I have created a parameter field, all of type Number - allow muliple (discrete) values, idential to Param1 2 and 3 in the main report.
When I choose to link the subreports, the first one works fine, but the second two - the parameter field in the subreport doesn't even show up as an option to be linked to. I tried putting them on the report canvas of the subreport to see if that helped, but it didn't. Any ideas?

 

[Katy44]

No idea what happened, but I went back in, linked my main report parameter fields to "Parameter fields" in the subreport (i.e. it prompts you for that subreport parameter when you run the report). Refreshed the report, and cancelled all the screens. I then went back in to "Change subreport links" and the parameter field was there to be selected!