SSRS 2005 vs 2008 - Problem with Procedures

In ssrs 2005 i was successfully using one stored procedure with two paramaters in one report

so in table 1 - us was using as a data set as Text exec dbo.some_prc @param = 1

and in table 2 - us was using as a data set as text exec dbo.some_prc @param = 2

all in the report body.

This does not seem to work in ssrs 2008 - I can get it to render results - but once I re-establish my procedure in the dataset - it wants for me to add paramaters in the report.

I have tried adding default paramaters in the re-established datasets to no avail.

when I load it to SSRS - it never times out but does not render.